Video: Vim li cas 802.2 thiaj li tsim nyog?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
802.2 muaj kev txhawj xeeb txog kev tswj cov tsheb khiav hauv lub cev. Nws yog lub luag haujlwm rau kev khiav thiab kev tswj xyuas yuam kev. Cov Ntaub Ntawv Txuas Txheej xav xa qee cov ntaub ntawv hla lub network, 802.2 Logical Link Control pab ua qhov no ua tau. Nws kuj pab tau los ntawm kev txheeb xyuas kab raws tu qauv, xws li NetBIOS, lossis Netware.
Raws li, lub hom phiaj ntawm snap raws tu qauv yog dab tsi?
SubNetwork Access raws tu qauv ( SNAP ) yog hais txog tus qauv siv rau kev xa IP datagrams hla IEEE 802 tes hauj lwm. Qhov no txhais tau hais tias tus IP datagrams tuaj yeem xa mus rau IEEE 802 networks encapsulated hauv SNAP cov ntaub ntawv txuas cov khaubncaws sab nraud povtseg 802.3, 802.4 lossis 802.5, cov khaubncaws sab nraud povtseg ntawm lub cev, thiab 802.2 LLC.
Tom qab ntawd, lo lus nug yog, vim li cas LLC thiab SNAP headers siv? Cov SNAP header yog siv thaum lub LLC raws tu qauv nqa IP pob ntawv thiab muaj cov ntaub ntawv uas yuav txwv tsis pub nqa hauv 2-byte MAC thav duab hom teb.
Ib yam li ntawd, nws raug nug, vim li cas IEEE 802 cov qauv siv?
TIAB SA 802 yog ib tsev neeg ntawm IEEE cov qauv nrog kev sib tham hauv cheeb tsam hauv cheeb tsam thiab cheeb tsam hauv nroog. Cov IEEE 802 tus qauv raug txwv rau cov tes hauj lwm uas nqa cov pob ntawv loj sib txawv, tsis zoo li cov xov tooj ntawm tes relay, piv txwv li, qhov twg cov ntaub ntawv raug xa mus rau luv luv, uniformly loj units hu ua cell.
LLC Logical Link Control yog dab tsi thiab vim li cas peb thiaj xav tau nws?
Kev ua haujlwm ntawm lub Logical Link Control ( LLC ) yog los tswj thiab ua kom muaj kev ncaj ncees ntawm cov ntaub ntawv xa tawm. Cov LLC muab cov ntaub ntawv Txuas Txheej txuas mus rau cov kev pabcuam rau Network Layer raws tu qauv. Qhov no yog ua tiav los ntawm LLC Service Access Points (SAPs) rau cov kev pab cuam nyob rau hauv lub network computers.
Pom zoo:
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