WAN (Wide Cheeb Tsam Network) yog hais txog lub koos pis tawj uas sib txuas rau cheeb tsam thaj chaw lossis thaj tsam cov nroog loj hauv cheeb tsam sib txawv. Nws muaj cov kev kawm dav dav, suav txog ntau txhiab mais, txuas ntau thaj tsam, nroog thiab teb chaws, thiab txawm hla ntau lub tebchaws kom tau txais kev sib txuas lus ntev. Piv nrog LAN (Local Area Network) thiab txiv neej (Cheeb Tsam Thaj Chaw Network), WAN (Wide Cheeb Tsam Network) koom nrog ntau yam khoom siv, xws li routers, keyboards, firewalls, thiab lwm yam. los ntawm microwave, satellite channel, thiab lwm yam. Tam sim no, WAN (thoob plaws thaj chaw network) siv cov qauv muaj xws li thav duab relay hloov network (thav duab-relay), taw tes-rau-kis raws tu qauv (PPP), cov ntaub ntawv qib siab txuas txuas tswj raws cai (HDLC) , thiab synchronous cov ntaub ntawv sib txuas tswj tau raws tu qauv (SDLC).
TUS TXIV NEEJ (Cheeb Tsam Cheeb Tsam Network) yog hais txog lub koos pis tawj tsim nyob hauv tib lub nroog, thiab nws qhov chaw muaj peev xwm npog mus txog 60 mais. Cov kis tau tus mob ncua ntawm MAN cheeb tsam nroog thaj chaw me me thiab qhov ceev nrawm. Nws tuaj yeem raug suav hais tias yog lub network qaum, uas sib txuas sib txuas rau cov chaw, chaw khaws ntaub ntawv thiab LAN nyob hauv cov chaw sib txawv hauv tib lub nroog los ntawm cov kho qhov muag hluav taws xob txhawm rau tsim kom muaj kev sib txuas xov tooj sib txuas. Cov kev cai siv tam sim hauv tus txiv neej muaj xws li Asynchronous Hloov hom (ATM), Faib cov kab tsheb loj ntawm tsheb npav (DQDB), thiab Cov Kev Hloov Cov Ntaub Ntawv Ntau Tshaj Loj (SMDS).
LAN (uas yog, network cheeb tsam hauv cheeb tsam) yog cov kev sib txuas dav siv thiab siv dav. Nws hais txog ob lossis ntau dua lub koos pij tawj (xws li servers, workstations) nyob rau thaj tsam li 1 txog 5 kis lus mev los ntawm cov txuas hluav taws xob (xws li cov xov coaxial, txuas xov ob kab, hluav taws xob kho qhov muag, thiab lwm yam) tau txuas nrog kom paub txog kev sib koom siv koos pis tawj, xws li tsev, chaw ua haujlwm, tsev kawm ntawv, lossis cov tsev nrog computers, servers, thiab khoom siv sib txuas (xws li tshuab luam ntawv, ntawv thaij, cov ua haujlwm, thiab lwm yam cia).
Tam sim no, Ethernet (IEEE 802.3 tus qauv) yog cov qauv kev siv LAN tshaj plaws. Xyoo tsis ntev los no, nrog cov kev tsim tawm ntawm 802.11 tus qauv, wireless kev cai xws li IEEE802.11a / b / g / n tau siv dav, thiab daim ntawv thov ntawm wireless LANs kuj tau nce. Qhov nrov dua, ntxiv rau, muaj token lub nplhaib thiab FDDI (Fiber Faib Cov Digital Sib Cuam, IEEE 802.8) hom LAN (Local Area Network).
Hauv cov ntsiab lus, LAN, txiv neej thiab WAN yog txhua hom ntawm lub network network. Txawm hais tias qhov xwm txheej ntawm kev sib txuas lus yog qhov qub, peb hom hauv kev sib txuas tseem sib txawv hauv kev npog thiab kev siv. Qhov sib txawv ntawm LAN, txiv neej thiab WAN muaj raws li hauv qab no:
 | Cov kev pab cuam |
Nws tuaj yeem pom los ntawm cov txheej txheem saum toj no tias qhov kev pab them nqi ntawm peb qhov kev nqis peev txheej yog LAN (cheeb tsam thaj chaw hauv nroog), txiv neej (thaj tsam thaj chaw network), thiab WAN (thoob plaws cheeb tsam network).
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| Xa cov khoom nruab nrab |
Feem ntau, LAN (Local Area Network) siv wireless WiFi lossis 100 / 1000Mbps network cable rau kev sib txuas lus; Tus txiv neej siv 100Mbps optical cable lossis modem; thiab WAN yog qhov sib txawv ntawm kev sib txuas lus ntawm cov neeg siv, nws feem ntau siv xov tooj kab, cov ntaub ntawv xov tooj xaib, kab xaib, thiab microwaves. Txog kev sib txuas lus hauv lwm txoj hau kev, nws kis tau tus mob qis dua li LAN (cheeb tsam thaj chaw hauv cheeb tsam).
| Cov lus tsis sib haum |
Kev tsim LAN (thaj chaw hauv cheeb tsam hauv nroog) tuaj yeem txwv tsis pub nkag mus rau cov neeg siv tsis raug cai, ua kom muaj kev ruaj ntseg kev lag luam, thiab tsim nyog rau cov neeg siv khoom lag luam. Rau tus txiv neej (Cheeb Tsam Thaj Chaw Network), qhov ntau tshaj yog cable TV network ntawm txhua tsev neeg nyob hauv txhua lub nroog. Ib qho ntxiv, ntau lub koomhaum tsoomfwv lossis tuam txhab lag luam kuj tseem tuaj yeem ntseeg tus txiv neej txuas cov chaw haujlwm hauv nroog nyob hauv ntau thaj tsam. Txawm li cas los xij, qee qhov kev pabcuam kev ua tub rog, kev tso tsheb nqaj hlau, dav hlua, thiab lwm yam yuav tsum muaj kev ruaj ntseg network siab, thiab cov kev sib txuas lus siab txog kev ruaj ntseg tuaj yeem ua tiav los ntawm kev tsim WAN (Wide Area Network).
| Tsim thiab tu |
Vim tias muaj ob peb lub network nyob hauv LAN (cheeb tsam thaj tsam hauv nroog), nws yooj yim los tsim thiab tswj dua li MAN (thaj tsam thaj chaw hauv nroog) thiab WAN (thoob plaws cheeb tsam network).
Hauv tsab xov xwm no, cov yam ntxwv ntawm LAN, txiv neej, thiab WAN lub koos pij tawj txoj kev ua haujlwm thiab lawv cov kev sib txawv tau pom. Tag nrho peb hom kev koom ua ke muaj lawv tus kheej tseem ceeb hauv kev sib txawv. Txhawm rau paub dab tsi yog LAN vs txiv neej vs WAN, thiab yuav ua li cas lawv sib txawv los ntawm txhua lwm yam, ib tus tuaj yeem siv lawv mus rau qhov chaw uas lawv haum.