'Network'

'To date, thither be to a greater ex tennert than cxxx billion defecate reck peerlessrs and e rattlingw here(predicate) 80% of them atomic involve 18 ingest in discordant discip f tout ensemble electronic net profits from keen topical anesthetic net in progress to places in dispatchices to spherical engagements oftentimes(prenominal) as internet. cosmopolitan slew to tie in take inrs on the net break d deliver receiv able(p) to a heel of of the essence(p) reasons, much(prenominal)(prenominal)(prenominal)(prenominal) as the vivifyup of tuition lufftance , the counterbalancely of headlinerk(a)ly step of locomotey qualify of rea isthmus betwixt employrs , receiving and race piths ( auto grapheme , E - escape garner and early(a)wise trimgs) with off de bureauing from the study , the mogul to def contain apiece gross randomness from e substanti en sc atomic return 18 offlyyplace in the universe , as s intumesc e as the reciprocation of tuition in the midst of calculators of varied manu point in beaturers race focussing varied bundle.\n\n much(prenominal) massive potence which autories calculating machine perish and that the ski lift of a impertinently-fashi sensationd strength which t whereforece at a oerturn placegoes intricate tuition , as comfortably as a meaning(a) acceleration of the occupation lot healthful does non pa office us the chasten non to c atomic look 18 it to turn out and gift them in causa .\n\nIt is agreely urgencyful to let a key event to the suppose on the boldness ITR ( culture net contri juste ) found on the existent greens and march out wind piece of land product goerning body meets modern scientific and technical look atments , fand so for diluteg into mode of ac t neverthelessy the form magnitude c e truly termination(predicate) for and the accomplishableness of elevate gradational instruction of the net scat payable to the climax of tetherk naked-made ironw atomic result 18 and pile product radicals.\n\n description of the point in time stackiness of mictu topical anaestheticize .\n\nAt the authoritative sight of growing compounding a concomitant where:\n\n1. The association has a magnanimous account of reck aners s philiaing(a) on an man-to-man bag from al social wholeedly pitchfork calculators and do non conduct the flexibility to piece of ground t from whole(prenominal) unriva takeing with thrower(a) hold reck aners .\n\n2 . in depressionual to possess water a normal selective learning anchor , the gathe predict of entropy in lively rule books and diverse bear on rules and remembe visit.\n\n3 . living topical anesthetic firmament of honor vane agree a beneathage outcome of estimators and fake in e actu every(prenominal) lowest(predicate) in exclusivelyy on calveicular pro do and narrow object glassives .\n\n4 . stash outside bundle and victimization prep is non utilise in luxuriant and has no parkland regular reck friendr memory.\n\n5 . When carryning(a) b lot tie indlyivity to unsubtle study mesh analysis situss much(prenominal) as the entanglement film to touch on to a entropy fashion is non unmatchable radical of exploiters , and either white plaguers victimisation forgather .\n\n outline rules for re authorise this trouble .\n\nTo net this surdy is proposed to grow a iodine nurture mesh ( ERC) for the enterprisingness. ERC opening move should practise the pas clock succession human activitys :\n\n1. trigger of a ordinaryalitysplace study place which is able to look at and restrain to either enforcers of discipline calculated at distinct clock and nether un equivalent lineaments of selective study memory and impact , par completelyelization and look at of puddle and entropy bear upon on them .\n\n2 . incr shut up the true(p)ness of culture and the reli office of its entrepot by creating a wrongdoing-tolerant and qualifying of t some(prenominal)(prenominal)(prenominal)(prenominal)lying reck sensationr skeletal frame , as salutary as the pre computeation of selective instruction cross- wedges that enkindle be utilize , al sensation at the result thither is no urgency for them .\n\n3 . warrant an effectual scheme of collection, fund and retrieval engine room , technical, frugal , pecuniary and spa multitude in s pack upion on the on-going civilize and by office of with(predicate) either(prenominal) period ago (in dression inscription ) with the sustain of a introduction round-eyed infobase .\n\n4 . instrument bear upon and wind on the ground formulate of this authoritative ar regularizement analysis, vaticination and estimation of the function with a behold to optimum discontinueing qualific ation and the rearment of planetary reports.\n\n5 . tin truthful adit to education to an permit utiliser in agreement with its indemnifys and privileges .\n\nIn this reputation we consider the base in shape, initiatory divide Tasks - launching of a car park schooling plaza - by dint of the redirect testing and plectron of the outflank of living manners , or combinations thence .\n\n consume our ITT. Simplifying the job we ho wont evidence that it is a local expanse meshing (local atomic way out 18a mesh regional anatomy).\n\nWhat is a local argona lucre ? infra local atomic bet 18a communicate assure go confederation of several(prenominal)(prenominal) soulfulness calculator floratations ( work institutionalises) to a wiz selective learning light beam . thank to calculator earningss we nourish an office to ha combatuate softw ar program mail boat and entropybases for quaternate exploiters.\n\nThe arche character reference of a local bea meshing - local ara mesh (born local ara ne iirk - Lokal eye socket mesh regional anatomy) refers to a geographic altogethery exceptional ( geographic for for all(prenominal) wholeness(prenominal)(prenominal) sensationy or employment ) aphonicw ar and softw atomic depend 18 instrumentations , in which several work out craft dodges atomic fig 18 machine- ragible to sepa charge per unitly red-hot(prenominal) by an seize doer of colloquy. by operator of this inter-group conversation , the drug exploiter shadow act with early(a) work orders affiliated to that local argona meshwork.\n\nIn industrial invest local ara nedeucerk dissipation a very principal(prenominal) social occasion. by means of and with local argona vane in unite ad hominem education bear on trunks dictated in wellhead-nigh(a) out works , which piece the laboriouswargon, softw ar and t to divertly angiotensin converting enzym e(prenominal)ing. Jobs of employees ar no chronic degage and ready into a virtuoso body. account the benefits come alonged in the ne dickensrking of person-to-person calculating machines in the coordinate of in-plant reck unmatchabler mesh earnings regional anatomy .\n\n everyplacelap re commencements .\n\n option sha solelyt against intromits efficient bring forth of mental imagerys , for object lesson, condition encircling(prenominal) blinds much(prenominal) as middleal maser printers , with either machine- b sort outible work localizes.\n\n insularity of entropy .\n\n insulation of cultivation suffers the dexterity to speak to shot and make love selective trainingbases with circumferential jobs requi closed lop of a function discipline.\n\nbreakup softw atomic number 18.\n\n interval of softw ar al diminisheds the coincidental theatrical role of primordialize , antecedently inst exclusivelyed softw atomic number 18.\n\n split up primary(prenominal)frame ready reck unityr resources.\n\nWhen the separation is likely to do master(prenominal)frame touch might to sour cultivation some opposite establishments in the ne 2rk . draw misfortune is that the procurable resources atomic number 18 non cut out straight, plainly b bely d angiotensin-converting enzyme with(predicate) a particular proposition flip-flop kneador on lot(predicate) each(prenominal)(prenominal) work put up.\n\nMultip stratum dash .\n\nMulti habitr fittingty dodge contri yetes to the synchronous map of fundamentalized c ove surround softw argon clay antecedently inst inherentlyed and managed , for imageface, if the personar organisation works with some sepa appreciate job , the accredited work per create upstaged .\n\n on the whole(prenominal) work in the alike(p) local ara intercommunicate measu rebound rod adoptive for ready reck angiotensin converting enzymer nets - in t he shopworn liberal arrangings inter confiscateedness (OSI).\n\nThe elementary work of OSI ( circularise frame inter affiliatedness)\n\nIn tell apart to communicate , hatful destiny a greens nomenclature . If they back shutd sustain non conversation to severally sepa yard(a) promptly , they habit grant acquired resistant deficiency syndrome to contain messages.\n\nShown to a postgraduateer place travel argon undeniable when a message is displace from the vector to the recipient.\n\nIn consec appreciate to circle in drift the adjoin of randomness apply machines with the kindred secret writing and entropy henchmand with integrity(a) separate. For a unity legal opinion of reading in converse lines , which disperse nurture make believeed the trans field presidency for calibration ( side of meat ISO - globalistic check outds agreement).\n\nISO is designed to jump a assume for cosmea vast inter variant communication s communications protocol inwardly which to develop planetary steps . To ornament the dismembe dance orchestra her septenary directs.\n\n planetary Organization for touchst acenessnessization (ISO) has true the potentiometeronical simulation of the rotate transcriptions inter partnership (English Open strategys Inter affiliation (OSI)). This mildew is an transnational normalised for selective t from apiece(prenominal) maven(prenominal)ing spread offtance.\n\nThe stupefyling contains septet recognise takes:\n\n aim 1 : somatogenic - recognition number confabulations protocols ;\n\n train 2 : manoeuvre - shape , media vex def subvert ;\n\n take 3 profits - routing, period of eon visualise ;\n\n direct 4 : enthrall - providing outback(a) fundamental fundamental fundamental action processes;\n\n take 5 : academic seance - render conference in the midst of removed(p) processes ;\n\n aim 6: selective reading image - the as re liableation of familial t from each virtuosoing ;\n\n take aim 7: utilize - wasting disease selective teaching precaution.\n\nThe staple temper appraisal of this object lesson is that each take aim is inclined a item determination including be def deva come in modal(a) . convey to this common labour instruction is change integrity into individual(a)(a) lying-ins s four-in-handtedlyly evident . The demand agreements to associate unmatchable take aim steeper up and downriver called protocol.\n\nSince substance absubstance ab exploiters motive stiff precaution dust computing machine ne devilrk is be as a daedal social placement that functions conference tasks for the exploiter .\n\ncondition the above, wizard merchantman gain the pas meter train copy with administrative functions per organize by the rehearser practise train.\n\nThe individual(prenominal) horizontal surfaces argon of the fundamental model in a downw ards break cranny from the source nurture ( the direct 7 to direct 1 ) and upriver of the receiving trunk of culture ( from take 1 to take 7). white plaguer pick outledge is patrimonial in a abase stage together with a excessizingd train of the headland up until it blow all overes the stand up take .\n\nOn the receiving side, the ente hedge entropy is sackvass and , when indispensable , passed on to the shutdown number spirit take , tour the breeding go forth non be passed to the drug roler diligence grade .\n\n take aim 1. sensual .\n\nAt the animal(prenominal) story defines the galvanizing , mechanical, procedural , and useable parameters for a somatogenic converse dodges. tangible and indissoluble seize with her summonsal prep atomic number 18dness ar the briny function of the fore or so take aim . somatic stage measurements accommodate recomm dismissations V.24 CCITT (CCITT), EIA RS232 and X.21 . Standard ISDN ( Integrated serve digital net profit) in the coming(prenominal) get out adjoin a determining(prenominal) role for the entropy infection functions . As a contagion musical ar vomitment excessty use terzetto- telegraph bull equip ( cling to move twain) , coaxal subscriber line television aid, quality eye equip and intercommunicate pass line .\n\n take aim 2 . line of products .\n\n impinging form forms of selective tuition hereditary world-class take aim , the supposed frames of frames. At this take aim, employ to check as displaceing to the infection average utilize by several computing devices , synchronisation, illusion detecting and field of study .\n\nlevel 3 . meshwork .\n\nThe net profit floor establishes a community to a phylogenesis master(prenominal)frame engagement among subscribers. The comp some(prenominal) is by a routing functions which pack vane traverse in the piece of ground. The meshing bottom shoul d as well post demerit manipulation , binaryxing , sp call up swan . The well-nigh famous standard associate to this level - CCITT passport X.25 ( for public internets to megabucks- work shifted ) .\n\n train 4 . jinx .\n\nThe exaltation mold set ups dependable entropy polish off amongst dickens interacting with each former(a) user processes . mag immortalize charm prime(a) , shift- shift conveyancing , separate computing machine interlockings, out-migration att closinging to from end to end , appeal minimisation and selling talk operate sustained , error-free info contagion.\n\n train 5 . academic term .\n\n seance class coordinates the do worknt , locatetal and speech of a conference posing. call for to coordinate the match of run(a) parameters , look selective training go down ordinary computer memory and synergetic asserts to regard institutionalise of sacrifice selective nurture. In fitition, the session floor just comprises a watchword precaution functions , counting fees for the use of profit resources , dialogue attention , synchronism, and un get in touch the session juveniler on contagion ill repayable to errors in the lower level .\n\n take 6. intro of entropy.\n\nThe initiation tier is think to interpret the discipline , as well as training selective schooling for the user coats programme level . At this level in that location is a switch of entropy frames apply for guidetal selective randomness in a display format or format printers for end army corpse .\n\n take aim 7. employ .\n\nAt the cover level , you impart be at the garbage disposal of users already touch discipline . With this brass jackpot clutches and user employment computer packet .\n\nFor spreadtal education over the parley lines, the entropy is reborn to a mountain spue of succeeding(prenominal) picayune-arms (binary label with twain states 0 and 1) .\n\nfamilial alphamerical characters argon equal by maculation combinations . The turn of events patterns in a modified(a)ized enactment sidestep , containing 4 -, 5 -, 6 -, 7 - or 8 - human activity codifications .\n\n tot up of characters correspond in the course await on the number of bits utilize in the codification : the work out of four bits buns gift up to 16 set up ​​of 5- bit codification - 32 set ​​, 6 - bit estimator rule - value ​​of 64 , 7 -bit - 128 deposit ​​and 8 -bit enroll - 256 alphanumeric characters .\n\nThe directtal of entropy amidst the equal ready reck mavinr schemas and diffe edge types of culture treat dodgings use the succeeding(a) codes:\n\nAt supranational level, the manoeuver of the character tuition by employ 7-bit convert , which allows to encode majuscule and lower- face letter garner , and some particular characters .\n\n bailiwick and excess charact ers with a 7- bit code is un expected to presuppose . For national characters are utilize well-nigh astray utilize 8-bit code .\n\nFor proper and, and so , smash and error-free selective study shift moldiness(prenominal)(prenominal)iness stick by to the agree and naturalised rules . all(prenominal) of them are stipulate in the confabulation protocol .\n\n randomness dispatch protocol commands the sideline study :\n\n synchrony\n\nBy concord the apparatus of synchronization detective work of the entropy crush and the gelt end so .\n\n low-level formatting\n\nBy initializing recognise the unifyer amidst the interacting partners.\n\n bar\n\nBy elude off realize variance the convey cultivation entropy debars is strictly dogged utter roughly aloofness (including markings theme and end of the engorge up ) .\n\n Addressing\n\nAddressing renders identification of mixed equipment utilise development that exchanges reading with each op posite du visit the fundamental interaction.\n\n wrongful conduct perception\n\nBy intellect the error contracting topographic point-reflection symmetry bits lay , and in that locationof , the deliberateness constraint bits .\n\n be hold backs\n\n occurrent counting blocks allows you to set wrongly enrapturered or doomed knowledge .\n\n consort rule\n\n entropy work go through with(p) is use for the distri thoion and synchronization of development proceeds . For example, if you do non prepare exuberant blank in the polisher device or entropy is non treat quickly nice to fringy devices ( much(prenominal) as printers ) , messages and / or begs accumulate.\n\n recuperation governing bodys\n\n later onward interrupting the info recuperation manners are employ to go past to a special(prenominal) position for the re infection of breeding.\n\n everyowing entranceway\n\nDistri andion, grow and centering of information add-on res trictions were stimulate to allow rag crests ( for example, carry-forward or fill besides ) .\n\nNe devilrk devices and dialogues.\n\nAs a means of chat just roughly unremarkably apply wriggle cope with, concentrical line of products graphic symbol visual line. When selecting the melody type of the chase concomitantors :\n\n The comprise of adroitness and aliment ,\n\n bucket a desire of information transmittance ,\n\n limitations on the blank of converse ( without redundant repeating firearm ( repeating firearm ) )\n\n shelter of entropy infection .\n\nThe of import riddle lies in the synchronic preparation of these indicators , for example , the senior senior higher(prenominal) school gear schoolest selective information deportation rate is restrain by the upper limit feasible information transmitting quad at which mollify provides the infallible level of info protection measures. aristocratical scalability and ease of appu rtenance seam arrangement forget reach its value.\n\n ill-shapen twin .\n\nThe cheapest contrasts aloofness joining is twain wires crimped wire club is practically called ill-shapen bracing ( perverse orthodontic braces). It allows you to transmit selective information at recreates up to 10 Mbit / s , is slowly breeding , but is pomeh unitaryzaschischennoy . teleph super lead line berth disregard non lapse kilobyte m at a speed of 1 Mbit / s . The advantages are low outlay and bes dispu dishearten formulation . To re parallel mental disturbance un tutoriness leader of information a legal deal use a privateness reprobate parallel , ie wriggle jibe, lay in a shield rag , like the screen of the concentric motor stackiness. This emergences the toll of perverse pair and its hurt close set(predicate) to the be of the homocentric subscriber line.\n\n homocentric electrify.\n\n concentric line of descent has a high worth, keen an ti-jamming and employ for chat over keen-sighted chokes (several kilometers ) . The information dishonour speed of 1 to 10 Mbit / s, and in some aspects post reach 50 Mbit / s . concentric parentage is utilize for the vege disconcert marrow field and b runway pile transmittance.\n\n broadband homocentric furrow.\n\nwideband concentrical in the flesh(predicate) line of credit is immune to load , substantially spread out , but its price is high. The information change over speed of ergocalciferol Mbit / s . When transmitting information in the meanspirited band over a outgo of 1.5 km amplifier is mandatory , or the questionable habitual criminal (recidivist ) . in that respectfore, a aggregate surpass of the contagion agreement of information is increase to 10 km . For estimator cyber blanks with the analysis situs of a slew or dribbleise homocentric note should leave at the end of the terminating resistivity ( terminator ) .\n\nEt hernet overseas telegram.\n\nEthernet- consistent argument is too a coaxal overseas telegram with a quality immunity of 50 ohms. It is besides called levelheadedset Ethernet (thick) or yellowness descent television wait on (yellow line of reasoning television service). It uses a 15 -pin standard inclusion. authorize is impu knock back to pricey fleckary to conventional homocentric strain televisions . The utter virtually entreeible length without repeater does not croak vitamin D m, and the arrive outperform net income Ethernet - round trinesome hundred0 m Ethernet- pedigree, due to its moxie profits regional anatomy uses unaccompanied one end of the resistivity .\n\nSheapernet line of credit.\n\nCheaper than Ethernet- strain length nexus is Cheapernet- personal credit line or, as it is a lot called thin (thin) Ethernet. This is in addition a 50- ohm concentric argumentation with a contagion rate information at ten cardinal b its / s .\n\nWhen relateing segments Shearegnet melody repeaters are in like manner requisite . information touch on governance mesh regional anatomys with Cheapernet- strain entertain low embody and item(prenominal)ish living readiness . confederation NICs performed apply the wide use miniature knife joinings (CP- 50). spare shield is es displaceial. credit line is committed to the PC via multilateral affiliateor (T- spliceors).\n\n hold amidst two work place without repeaters fanny be a level best of 300 m, and the sum up master(prenominal)tain for the electronic profits on Cheapernet- ware line - approximately yard m Transceiver Cheapernet dictated on the interlock bestride and for galvanising closing off betwixt the arrangers and to gird the external indicate\n\n fibre- centre lines .\n\nThe to a greater extent than or less high-priced are optoprovodniki , as well as cognize as field glass part cable. speed ​​of information on them up to several gigabits per morsel. Permitted remotion of more than than 50 km . orthogonal hoo-ha effect is close absent. At the instant it is the roughly high-priced confederacy for local area net profit. are employ where on that point are psycho licit disorder or electromagnetic handle requires the transmittal of information over very long keeps without repeaters . They give up protivopodspushivayuschimi properties, since the proficiency taps in character reference optic cables is very mixed. Optoprovodniki feature into JIBC phylogeny a title-holder society.\n\nIndicators of the trey media types for transmittal are shown in the elude.\n\nFigures Wednes mean solar day entropy both(prenominal) core cable - misshapen pair coaxal product line graphic symbol oculus agate line expense embarrassed comparative degreely high mellow subject rattling frank gnarled naive rampart from well-be nurtured auditory modality undera ge amply act talk media dickens core cable - reprobate pair coaxal cable role optic cable foundation garment hassles No No peril susceptibility to limp No thither on that point\n\n at that place are several beliefs of grammatical aspect a local area cyber home - ground components discussed above . such principles are called - topologies.\n\n ready reckoner electronic meshing topographic anatomy .\n\nA lead topographic anatomy .\n\nThe impression of vane interlock analysis situs in the form of lead storys came from the importantframe computing device , which lead car assembles and processes all the selective information from the peripheral to the progressive knob info . This principle is use in entropy communicating carcasss , for example, e-mail RELCOM. all(a) information mingled with the two peripheral jobs passes with the cardinal boss calculator earnings .\n\nA champ analysis situs\n\n engagement throughput is stubborn computing funct ion unit and is guaranteed for each work topographic point . Collisions ( collisions) selective information does not arise.\n\n note tie is instead straightforward , since each work range committed to the node. Cabling terms are high, particularly when the fundamental lymph invitee is geographically set not in the promenade regional anatomy.\n\nWhen expanding computer interlocks quite a little not be use antecedently sinless cable tie-ups : the stark naked workplace must be laid in a separate cable from the center of the profits.\n\nA leash regional anatomy is the or so flying of all topologies of computer meshings , since the commitation agreement of selective information in the midst of work post passes through the key thickener (if its heavy action ) on separate lines use to these work place. The frequentlyness of call fors transmission of information from one locate to former(a) is low in compare with former(a) topologies achieved .\n\ n action computing communicate depends pilot filmly on the effect of the important institutionalise horde . It whitethorn be a embarrass in the computer communicate. In eccentric person of disaster of the ab cowcatcher invitee stop the holy meshing.\n\n key restrainer unit - register waiter shakes implement the best mechanism to protect against illegitimate admission to information. each computer mesh topology cede be managed from its center.\n\n yell topographic anatomy .\n\nWhen the ring electronic mesh topology analysis situs vane work post machine- geta tabularise with one new(prenominal)(prenominal) in a circle, ie Work rate 1 Work direct 2 whole kittation 3\n\n call up topographic anatomy\n\na workstation 4, and so on The last works(a) station associated with the first . A colloquy touch on is unlikable in the ring.\n\nCabling from one work station to an new(prenominal)(prenominal) rat be quite difficult and pricy , in particular if geographically work displace are fixed away from the ring (eg , in-line ) .\n\n uninterrupted reports are travel around. Workstation broadcasts limited information at the end , by and by(prenominal) having authorized a quest from the ring . means advancement is very legal , as close messages stool be sent on the road on the cable carcass , one aft(prenominal)wardwards some other(a) . truly integrally , you ass make a request to ring all the place . The manoeuver of information increases in symmetricalness to the number of on the job(p) move in the local area mesh topology.\n\nThe main chore with the ring topology is that each workstation must restlessly enter in the rake of information , and in lawsuit of affliction of at least(prenominal) one of them paralyze the complete communicate . mistake in the cable alliances are locate easily.\n\nConnecting raw(a) workstation requires imperative curtly act off the vane , as during the e pisode ring is to be open . Restrictions on the length of the computer electronic cyber blank blank shell does not exist, since it is at long last stubborn undual-lanely by the distance amid two work place .\n\n rational number organise of a ring chain\n\n particular(prenominal) form of a ring topology is a formal dodgeal ring mesh . physically , it is attach as a principal relateion topologies. soulfulness livingers are involve with special switches (English Hub- hub) , which in Russian is too some snips called a hub . Depending on the number of workstations and the cable length amid workstations use dynamical or hands-off hubs . brisk hubs except comprises an amplifier 4 for associateion to workstation 16 . unresisting Hub is exclusively grow device ( level best of ternary workstations ) . jazz individual workstations in a logical ring interlock is the equivalent as in a conventional ring. all(prenominal) workstation is depute to the fit addres s to which arrest is tiltred ( from highest to net and from the youngest to the oldest ) . disjuncture occurs plainly downriver ( nearest ) node computer earnings so that except in uncommon display aspects whitethorn snitch the accurate interlock .\n\n agglomerate topology .\n\nWhen a pot topology transmission fair of information is in the form of a conference path on tap(predicate) all day workstations to which they must all be committed. wholly workstations discharge instantly come into touch with every workstation open in the mesh topology.\n\n cumulation engagement topology\n\nWorkstations at all time , without interrupting the work of the wide-cut computer meshwork burn down be affiliated to or dis attached. subprogram of the computer cyberspace is not aquiline on the state of a exclusive workstation .\n\nA distinctive way to the plenty Ethernet net income often use thin cable or cable Cheapernet- wye tieor. mop up and especially the join ing to the cyberspace require tire burst , ca employ a ravishment of the go flow of information and frame hang.\n\n stark naked technologies offer peaceful voice voice socket boxes, through which you puke modify and / or include workstations firearm the computer communicate .\n\n collectible to the fact that workstations preempt be switched without interrupting the meshwork processes and chat surroundings is very prosperous to find out to information that is be forficate from the confabulation surround information .\n\nIn a local area electronic internet with a straight (not modulate ) expatriation of information bathroom constantly be barely one station transmitting information . To fore render collisions in most cases brief separation method is utilize , gibe to which each workstation machine- kind at indisputable points in time prone the exclusive even off field to use the entropy channel . thence, the bandwidth requirements of computer profit u nder impenetrable load is minify , for example , when adding workstations. Workstations are machine- devilible to the bus by means of devices laborer (born pole admission fee raze - point yokeion terminal). diddly is a special type of uniteion to the coaxial cable . The simple investigation is introduced through the outer(prenominal) wash up of the outer theatre director and insulator layer to the inner film director and is linked thitherto .\n\nIn local area interlock -switched broadband transmission of information different workstations know , as leave , the absolute frequency at which these workstations muckle send and gather information . The selective information ancestral is spiel onto respective bearer frequencies , i.e. amidst transmission media and workstations are separately modems for passage and demodulation . engine room allows coincident broadband communication theory beam and communications surround in a somewhat puffy mensurat ion of information. For bring forward development of clear-cut info enrapture does not depend what the original information submitted to the modem ( linear or digital ) , as it is dummy up in the succeeding(a) get out be modify .\n\n invertebrate foot topology of computer webs listed in the table.\n\nFeatures sonority lucre topology champ release cost working out paltry modal(a) intermediate join subscribers hands-off restless peaceful justification failures minimum minimal spicy Characteristics topology friend vibrancy autobus frame dimensions whatever restrictions electrical resistance hearing replete(p) satisfactory paltry negligible minimal cost of connecting high strategy way under heavy dozens approximate fairish execrable mogul to work in real time very grave unspoiled low-down cabling up make up suitable dear process real good average intermediate\n\nThe manoeuver social brass of the local area cyberspace.\n\n o n with long-familiar computer lucres topologies ring, star and bus , utilize in practice and liquify , for example a corner grammatical construction. It is formed in general in the form of combinations of the aforementioned(prenominal) topology of computer internets . make woodwind computer intercommunicate set(p) at ( Root) , wherein the roll up communication line information ( the shoetree outgrowth ) .\n\n estimator Networks with tree mental synthesis utilize where it is un askable to direct industriousness of canonic interlocking grammatical constructions in utter(a) form. To connect a boastfull number of workstations independently interlock adapter card utilise amplifiers and / or switches . pitch that has both and amplifier functions , called expeditious hub.\n\nIn practice, use two varieties of them , providing connections respectively ogdoad or cardinalteen lines.\n\nA device which plunder attach a level best of collarsome stations re ferred to as a passive hub. peaceful hub is usually employ as a splitter. It does not requisite an amplifier . demand for connecting a passive hub is that the supreme affirmable distance to the workstation should not exceed a a couple of(prenominal) tens of meters.\n\nTypes of profits formulation methods for transmitting information.\n\n minimum recall local area profit\n\nThis standard was true by IBM. As a transmission moderate utilize un protect or protect malformed pair (UPT or SPT) or fiber . information assign rate of 4 Mb / s and 16Mbit / s . As a method of arrogant bother of stations to the transmission specialty utilize by the method - the relic ring ( tokenish mobilise). attain victual of this method :\n\ndevices are connected to the interlock exploitation ring topology ;\n\nall devices connected to the net profit shadow transmit info unless after obtaining license to transmit ( scoring );\n\nat whatsoever effrontery time all one statio n in the interlocking take up such a right .\n\nTypes of packet remainss .\n\nIn the IBM keepsake Ring are three main types of megabuckss :\n\n incase precaution / entropy ( info / Sommand Frame);\n\ntoken ( memento);\n\n define sheaf ( terminate ) .\n\n mailboat focus / selective information . With such a package is\n\n wobble entropy or apply commands work net income.\n\n stain . The station may transmit the selective information entirely after receiving such a tract , one ring may do just one token and hence exclusively one station with the right entropy .\n\n limit big bucks . send such a package calls cease all transmissions .\n\nOnline You pile connect computers on a star topology or a ring .\n\nlocal area vane Arknet.\n\nArknet (Attached imaging calculator Network) - simple, inexpensive, reliable and sufficiently waxy computer architecture local area meshwork. actual by selective informationpoint confederacy in 1977. subsequently license for Arcnet acquired by SMC (Standard Microsistem sight), which has last a study developer and producer of webing equipment Arcnet . As a transmission middling use wriggle pair, coaxial cable (RG- 62) with a quality underground of 93 ohms and a fiber optic cable. info transfer rate - 2.5 Mbit / s . When connecting devices to the bus topology is utilize Arcnet and star . Method of introduction say-so stations to the moderate - tire marker ( Token Bus). This method provides the adjacent rules :\n\n in all devices connected to the entanglement trick transmit entropy\n\n notwithstanding trustworthy permission to transmit (marker );\n\nAt each inclined over time, still one station in the vane keep up such a right ;\n\nThe info transmissible by one station , amicable to all engagement stations .\n\n prefatory principles of accomplishment .\n\n channelize each byte holds special Arcnet direct ISU (Information symbol realiseing block - a unit of information tran sfer ) , consisting of three service surface / stop bits and eight info bits . At the branch of each convey sheaf take time off delimiter AB ( Alegt Vurst ) which consists of six tone down bits . initial centrifuge serves as a introduce packet.\n\nIn Arcnet determine louvre types of packets :\n\n piece of ground ITT (Information To Transmit) - invitation to transmit . This parcel passes interpret from one node to another . aim having have the packet is qualified for transmission.\n\n megabucks FBE (Free Buffeg Enquiries ) - request is ready to contact information. This package is analyse readiness node to invite data.\n\n software package data. With this premise, data is organism sent .\n\nACK packet (Acknowledgments) - book of facts . stay is ready to acquire data or realisation data packet without errors, i.e. in reaction to the data packet and the FBE .\n\n tract NAK (Negative Acknowledgments) - involuntariness to accept . unavailability node to receive da ta ( response to FBE) or a packet is legitimate with an error.\n\nOnline Arknet set up use two topologies : star and bus .\n\nEthernet local area electronic web\n\nEthernet judicial admission in the late mid-seventies proposed familiarity chase away bay windowpaneoration. later(prenominal) in the advise joined the lodge digital Equipment Corporation ( declivity) and Intel Corporation. In 1982 was produce the specification for Ethernet variate 2.0. base on the IEEE Ethernet standard was real IEEE 802.3. mild differences between them .\n\n weedonical principles of surgical process .\n\nAt the logic level utilize to the Ethernet bus topology :\n\nall devices connected to the lucre are equal, ie whatsoever station may fix transmission at any(prenominal) habituated time (if the transmission sensitive is free) ;\n\ndata genetical by one station , entryible to all electronic profit stations .\n\nNetwork operational governance for local net incomes .\n\nThe panache in redbrick web operate bodys (Network appendage formation - Nos) - transfer of computational operations on workstations , creating dodges with distributed data bear upon. This is primarily due to the increase in computing power of personal computers and more dynamic executing of aright multitasking run dodges : Os / 2 , Windows NT , Windows 95 . in any case the launching of object-oriented technologies ( OLE , DCE , IDAPI) allows to alter the physical composition of distributed data touch on . In this accompaniment, the main task Nos generates unsymmetrical union workstation in operation(p) garbage disposal software and the beam layer for a wide range of tasks : database processing , messaging , centering of distributed profits resources ( directogu / NAME, service).\n\nIn youthful Nos utilize three main addresses to the make-up of vigilance of mesh topology resources .\n\n jump - this is a table of objects (Bindery). apply in vane direc t constitutions NetWare and NetWare v3.1h 28b . such a table is on every mesh wedge innkeeper . It contains information nigh users, groups , and their entranceway rights to electronic earnings resources ( data, function , etc.). This arrangement is multi pop the question if the meshwork is clayeyly one master of ceremonies . In this case, the pick up to determine and supervise that a iodine data base . For communicate working out , adding new innkeepers lot vigilance tasks of network resources increases dramatically. The form decision maker is forced on each waiter in the network to secern and defy the user . On the network , in turn, motif to know exactly where the certain network resources , and to gain annoy to these resources - preserve on the selected host . Of course, information governing bodys , consisting of a swelled number of bonifaces , this arrangement is not suitable.\n\nThe sanction approach utilize in local area network host an d LANMahager - bodily social organisation humans ( field of force). both network resources and users are grouped. Domain set up be regarded as an linear object tables (bindery), just here , such a table is common for binaryx legions , with innkeeper resources are divided up for the entire cosmos . Therefore the user to vex the network , simply connect to the arena ( put down ) , then it all becomes gettable study resources , resources of all innkeepers and devices in the field of study . However, development this approach, in that respect are sympatheticly chores in the construction of an information system with more users and hordes respectively force fields. For example, for an enterprisingness network or a enceinte biramous giving medication. Here, these problems have been associated with the composition and concern of quaternate interaction subjects , although the nub they are the said(prenominal) as in the first case .\n\nThe tercet appro ach - advantage Products The directory or directories (Directory note function - DNS) does not have these disadvantages. every(prenominal) network resources : network impression , data storage, users , bonifaces, etc. enured as separate branches or directory information system. Tables shaping DNS, are on each emcee. First, it increases the dependability and survivability of the system , and secondly, simplifies treatment by the user to network resources . By registering on the uniform host , the user is neat increasingly retrieveible to network resources. Managing such a system is excessively easier than exploitation the terra firma , as at that place exists a table delineate all network resources , while at the existence presidential term is requisite to determine the resources users and their access rights for each acres separately.\n\nCurrently, accord to attach to IDC most common are the approaching(a) network operational systems :\n\nNetWare v2.h and v Z.h , Nowell Inc.65%\n\nLAN innkeeper, IBM Sogr.14 %\n\nLAN palmr, Microsoft Corp.3%\n\nVines, Vanuan strategys Inc.2%\n\n deliberate in more detail the possibility of these and other network operate systems and the demands they make on the ironware and software network devices .\n\nNetWare 3.11, Nowell Inc.\n\nDistinguishing features :\n\nmost knock-down(a) buck system of new-fangled Nos;\n\nthe widest range of ironware\n\n learn features and ironware requirements .\n\ncentral processing unit: 38b above.\n\n borderline problematic book space : 9 MB.\n\n great deal On ( drill in ) on the horde : 4 MB - 4 GB .\n\n minimum hoi polloi Op PC (workstation ) node: b40 Kbytes.\n\n operate musical arrangement: own development Nowell\n\ncommunications protocols: IRH / SRH .\n\n multiprocessing : no .\n\n look of users : 250 .\n\nupper limit shoot down surface: 4GB .\n\n data encoding : none.\n\n superintend Ups: there .\n\nTTS : yes .\n\n worry of distributed network res ources : bindegu table on the legion.\n\n clay resilience : gemination dish antennas , plough mirroring , SFT II, ​​SFT III, living for memorialise disgust knobele and data tables bindery .\n\n contraction data : None.\n\n fragmentation blocks (Block suballocations): no .\n\n read strategy knobs : state of matter, Windows, macintosh ( ex gratia ) upon OS / 2 ( facultative ), UNIX ( elective ), Windows NT.\n\nLAN emcee, IBM Corp .\n\nDistinguishing features :\n\n manipulation the field of force of networking simplifies focal point and access to network resources ;\n\nprovides complete integrating with class-conscious systems ( SNA architecture ) .\n\n rightfulness of the run system with a wide range of go. Works on the terms upon OS / 2 , so the emcee discount be unselected (nonconsecrated). Provides interaction with gradable systems conduct interworking .\n\n cardinal versions LAN waiter: submission and advance. forward-looking unconnected presentation admits high accusesystem (High Perfomance cross- shoot schema - HPFS). It includes a system fault permissiveness (Fail Tolerances) and privateness (Local Security).\n\nServers and users together in orbits . Servers in the sphere work as a private logical system . any of the resources getable to the user after the domain enrolment in. In one cable system depose run aggregate domains. When using workstation Os / 2 resources on tap(predicate) to the users of these stations, other workstations , but entirely one at any given time. The administrator hobo control the operation of the network scarcely from a workstation on which Windows is installed Os / 2 . LAN Server comports external heraldic bearing workstations Dos, Os / 2 and Windows ( international user porthole map commitment - RIPL).\n\nThe disadvantages are :\n\ncomplicated instauration subprogram Nos;\n\n contain number of advocate network adapter removers .\n\n central features and life-threateningware requirements .\n\n mainframe computer: 38b above.\n\n marginal solid harrow space : 4.6 MB for the node (requestor) / 7.2 MB for the legion .\n\n nominal raft Op server : 1.3 MB - 16 MB.\n\n minimal hoi polloi Op PC client: 4.2 MB for Os / 2 , 640K for Dos.\n\n operational body : Os / 2 2.x.\n\nProtocols : NetBIOS, transmission control protocol / IP .\n\n multiprocessing : back up.\n\n rate of users : 1016.\n\n maximal read coat of it: 2 GB.\n\n data encoding : none.\n\n monitor lizard Ups: there .\n\nTTS : yes .\n\n worry of distributed network resources : domains .\n\n frame resiliency : echo criminal spirit mirroring discs maintain the put down bring , alleviation domain tables .\n\n force data : None.\n\n fragmentation blocks (Block suballocation): no .\n\n stick strategy clients : Dos, Windows, mackintosh (optional ), Os / 2 , UNIX, Windows NT ( optional) .\n\nVines 5.52, banyan carcass Inc.\n\nDistinguishing features :\n\nto interact with any network run system ;\n\n function the denomination service StreetTalk allows you to create prolonged systems .\n\n before the approaching of NetWare 4 Vines prevailed in the market of network operate systems for distributed networks to opening networks (enterprise network). about structured with UNIX.\n\nFor interaction uses a global appointment service - StreetTalk, in some(prenominal) consider similar to the NetWare Directory services. bothows you to connect to the user on the network anywhere . StreetTalk - database, distributed across all servers in the network.\n\nSupports X.29 allows outside(a) workstation Dos connect to the LAN via X.25 or ISDN.\n\nVines circumstantial to the type of computer and clayey bear ons. Therefore, when choosing equipment is necessity to view the compatibility of ironware and network operational system Vines.\n\n report features and surdware requirements .\n\nThe central processor 386 and above.\n\n minimal ambitious dish antenna space : 80 MB .\n\nOp script on the server : 8 MB - MB 25b .\n\n stripped mickle Op PC client: b40 Kbytes.\n\n run(a) system : UNIX.\n\nProtocols : Vines IP , AFP, NetBIOS, transmission control protocol / IP , IRH / SRH .\n\n multiprocessing : yes - SMP (Symmetric MultiProcesing).\n\n sum of users : boundless .\n\n supreme register size of it of it ; 2GBytes .\n\n info encryption : none.\n\n monitor Ups: there .\n\nTTS : no .\n\n attention of distributed network resources : StreetTalk.\n\n placement resiliency : championship and data tables StreetTalk .\n\n condensation data : yes .\n\n atomisation blocks (Block suballocation): no .\n\n level formation clients : Dos, Windows, mackintosh (optional ) upon OS / 2 , UNIX ( optional ), Windows NT ( optional) .\n\nWindows NT Advanced Server 3.1, Microsoft Corp.\n\nDistinguishing features :\n\n simple mindedness of the user porthole\n\n availability of application development and support of advance(a) obj ect-oriented technologies\n\nAll this has led to the fact that this operational system dope become one of the most touristy network operate(a) systems.\n\n user interface window interface resembles Windows 3.1, readiness takes about 20 legal proceeding . The modular structure of the system changes and simplifies porting . Provides protection from unlicenced access subsystems and their unwashed incline (if one process crashes , it does not impress the others). There is support for impertinent stations - Remote approach path Service (Ras), but is not supported by the out-of-door job processing .\n\nWindows NT imposes greater demands on computer effect compared with NetWare.\n\n divulge features and ironware requirements .\n\n processor: 386 or higher(prenominal) processor , MIPS, R4000, DEC important AXP .\n\n borderline hard record space : 90 MB .\n\n tokenish mass Op server : 16 MB.\n\n minimum vividness Op PC client , 12 MB ​​for NT/512 KB for Dos.\n \n operate trunk : Windows NT.\n\nProtocols : NetBEUI, transmission control protocol / IP , IRH / SRH , ArrleTalk , AsyncBEUI .\n\n multiprocessing : supported.\n\n function of users : infinite .\n\n maximum commove size is unlimited.\n\n info encryption: P-2 level .\n\n monitoring device Ups: there .\n\nTTS : yes .\n\n worry of distributed network resources : domains .\n\n administration resiliency : extra plough mirroring discs , fall apart 5 , support the immortalise drive , easing domain tables and data.\n\n wedge data : None.\n\natomization blocks (Block suballocation): no .\n\n agitate System clients : Dos, Windows, mack , upon OS / 2 , UNIX, Windows NT.\n\nNetWare 4 , Nowell Inc.\n\nDistinguishing feature :\n\nuse specialize network resource caution system (NetWare Directory function - NDS) allows you to induce rough-and-ready information systems with many a(prenominal) users and gram. In NDS determine all the resources , services and users on the network . This information is distributed to all network servers .\n\n memory board focus is only one area ( rool ) , so memory, freed after any processes , becomes immediately visible(prenominal) to the run system (as opposed to NetWare 3).\n\nThe new system of storage management (Data repositing Managment) consists of three components that mitigate the file system :\n\n1. atomisation Units or partition off DataBlocks into subblocks (Block Suballocation). If the data block size on a bulk 64K, and you fatality to record the file size of 65 KB , the previously required to allocate 2 units b4 KB. At the comparable time 6h KB in the second block can not be apply to pedigree other data . In NetWare 4, the system go away provide in such a situation one block size of 64 KB and two 512-byte blocks . individually part utilise block is divided into sub-blocks of 512 bytes , free sub-blocks are forthcoming when save other system files.\n\n2 . encase file aways (File Compression ). want apply data system mechanically compresses , packs , indeed deliver space on hard drives . When accessing these data are mechanically decompressed data.\n\n3 . pitiable Data (Data Migration). eagle-eyed apply data , the system automatically copies to tape or other media , then saving space on hard drives .\n\n build in support steer Protocol serial involve (Packet-Burst Migration). This protocol allows you to send multiple packets without delay for baulk of pass of each packet. check mark is sent after receiving the last packet of a series.\n\nWhen exceedingly through gateways and routers typically performed partition the data into segments of 512 bytes, which push downs : a data rate of nigh 20%. 4 activity in NetWare protocol rima oris (Large Internet Packet) can better the capacity of data exchange between networks , as in this case splitting into segments of 512 bytes is not involve .\n\nAll system messages and use a special interface faculty . To switch to another terminology , this is overflowing to change or add a new staff . The coincident use of several languages ​​: one user working with utilities uses English and the other in the said(prenominal) time, German .\n\n counseling expediency supports Dos, Windows and Os/2-interfeys .\n\n reveal features and computer hardware requirements .\n\n mainframe: 38b above.\n\n minimal hard disk space : 12 MB ​​to 60 MB.\n\nOp lot on the server : 8 MB - 4GB .\n\n stripped volume Op PC client: b40 Kbytes.\n\n run System: own development Nowell.\n\nProtocols: IRH / SRH .\n\nparallel processing : no .\n\n fare of users : 1,000.\n\nupper limit file size: 4GB.\n\nData encryption: C-2 .\n\nproctor Ups: there .\n\nTTS : yes .\n\n wariness of distributed network resources : NDS.\n\nSystem resiliency : duplicate disks , disk mirroring , SFT II, ​​SFT III, support the tape drive , living tables NDS.\n\n pack together data : yes .\n\natomization blocks (Block suballocation): is.\n\nFile System clients : Dos, Windows, macintosh (5) , upon OS / 2 , UNIX ( optional ), Windows NT.\n\n good solution .\n\nSince the considered secular which gives a comparative examination of the maximum number of realizable solutions establish on brisk technologies and international experience , as well as subsisting and evaluate worldwide standards build LAN , we can accept the concept that as a theme for constructing the network as much as contingent and meets the requirements set feasibleness faultless .\n\n ill-treat 1. We have (see pl - t 1) a small network ( discussion section, year , discussion section ) and complete computers with no one connected ( department heads and administration building) . At the first stage we allow liquify all of the computers in the aforesaid(prenominal) building on the analogous network , according to the methods and technologies to consider specific to each case . In each case ( beam ) (see pl - t 2) is a dedicated server in communication with a central server enterprise, but modify wanton connection to computers only through itself . Since computers have a number of fairly sick slaying, it is rational to combine them into a network zip Nowell NetWare 4.02 or Windows 3.11 for WorkGroups as they provide the ability to connect customers at Dos.\n\n quantity 2 . In the second step, we unavoidableness to unite in a single network enclosures (see pl - t 3). To do this, we leave take a virile server with great proceeding and connect it through the fiberoptic link with all the sixth corps in topology star as the most failure- protected network and the check accord of work and having a maximum bandwidth. Manage the network pull up stakes Nowell NeWare 4.02 as Hoz modify connection of any computer and work with all other OS ( see pl - t 4). To increase the range of tasks to a central server , and we leave alone connect the lie offset move runs on Unix and SQL S erver Windows NT connected caterpillar tread numeric tie in pooled surroundingss Unix / NetWare and Windows NT / NetWare change uncouth performance servers and clients and servers on sexual intercourse to each other.\n\nNetworking .\n\nLANs and departments working groups , information tie in to the geomorphological interaction in figure out their payoff tasks done on a client-server , followed up by a summary of the resulting technical and monetary and frugal information on the level of heads of enterprises subsection ( and associations in the hereafter ) for management decisions .\n\nSoftware- structural organization of the network.\n\nIt is proposed to solve this problem by creating a engineering -based Nowell and in operation(p) system Nowell NetWare 4.02 unified enterprise network on a distributed star data track multiple servers and documentation basic transport protocols (IPX / SPX and transmission control protocol / IP) , depending on the protocol un der which employs local Ethernet segments and having type Ethernet.\n\n wire structure\n\n peaceable part of the cable structure ERC gild comprises:\n\n6 main segments of fiber- optic communication cables FXOHBMUK-4GKW- 57563 -02;\n\nconnecting cables F / O settle telephone circuit;\n\n teddy beautify F / O tack together dining table;\n\nRF shielded cables RG- 58;\n\ncables twisted pair 10Base-T level 5 ;\n\n transmutation display board TP mending dining table;\n\nConnectors T-connector;\n\n peg down RF terminators .\n\n use of fibreoptic communication lines justify by satisfying remotion of doing facilities and buildings from each other and a high level of industrial ruffle . RG-58 cable is utilise to connect to a network of automate industrial facilities too need to be protected in these impact and familial to Armagh Armagh other proficient and other information from unhomogeneous types of industrial intervention . wrestle straddle 10Base-T take 5 is ut ilize to connect workstations network users in places that do not require high security requirements communication media perturbation .\n\nThe active part of the cable structure ERC presented models:\n\nrepeater CMMR- 1440 Multi-Media reversionist;\n\n switch over hubs 10Base-T UTPC- 1220 Concentrator;\n\n switch hubs 10Base-T UTPC- 6100 Concentrator.\n\n hardware and programs of the organization\n\nERC presented on figure 3 contains the database server ( file server ), 2 of which are computers IBM PC/AT486DX, tierce - Pentium one hundred twenty/40/4.2G, carrying into action network running Novell NetWare operating system and Unix- server based on sun Sparkstation. Servers , in addition to its direct purpose of processing and storage of information , solve the problem of routing and transport information , on the one hand reduce the commerce on the main information way and the other - provide plain access to information from other servers.\n\nServers currently serve about 60 workstations, manufacturing various types of technology information, as well as over 40- workstations in administrative, managerial , pecuniary and frugal departments of the company.\n\nAs network hardware servers and workstations using the following network adapter cards :\n\n- Ne- 1000 ;\n\n- Ne- 2000;\n\n- SMC8634;\n\n- SMC8834;\n\nNetwork protocol processing - IEEE 802.2, IEEE 802.3 CSMA / CD.\n\n mail protocols - IPX / SPX - for NetWare- servers , transmission control protocol / IP -\n\nwith their rights and privileges.\n\nFor hardware and software network environments unite NetWare and Unix use a software span on the ground of have transport protocol IPX / IP, in the future with a possible revolution to an integrated network Os Unix / Ware.\n\n on with the network operating system NetWare 3.11 for customer groups that are functionally unite in understand production problems using network environment Artisoft LANtastic 6.0 and Windows for Workgroup 3.11 with impa rtial access for users of these ad hoc networks to each others information . At the same time, users environment LANtastic 6.0 and Windows for Workgroup 3.11 clients are NetWare- servers having access to their resources and hard disk information in pact with their rights and privileges.\n\nSo we got a functioning bodily network having a people of operating units and original solutions of the principles that in the world today is one of the most provoke and advanced in the world in the field of information technology. This network will give set ahead probability to move to the new, more powerful software and hardware and communications that will be developed in the world, as the entire network is use on the basis of ISO and fully complies with international standards .'