Ua ntej, OLT yog lub davhlau ya nyob twg kho qhov muag, thiab ONU yog qhov chaw kho qhov muag (ONU).Lawv yog ob qho tib si optical kis tau tus mob network txuas khoom siv.Nws yog ob qhov tsim nyog modules hauv PON: PON (Passive Optical Network: Passive Optical Network).PON (passive optical network) txhais tau hais tias (optical distribution network) tsis muaj cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob.ODN yog tag nrho cov tsim los ntawm cov khoom siv passive xws li optical splitters (Splitter) thiab tsis xav tau cov khoom siv hluav taws xob kim kim.Lub network passive kho qhov muag suav nrog cov kab hluav taws xob kho qhov muag (OLT) tau teeb tsa ntawm lub chaw tswj hwm hauv nruab nrab, thiab ib pawg ntawm thawj theem sib piv cov khoom siv kho qhov muag (ONUs) ntsia ntawm tus neeg siv qhov chaw.Optical distribution network (ODN) ntawm OLT thiab ONU muaj cov fibers optical thiab passive optical splitters lossis couplers.
Router (Router) yog ib lub cuab yeej uas txuas rau ntau lub network hauv cheeb tsam thiab thaj chaw dav hauv Is Taws Nem.Nws cia li xaiv thiab teeb tsa txoj hauv kev raws li cov xwm txheej channel, thiab xa cov teeb liab hauv txoj hauv kev zoo tshaj plaws thiab nyob rau hauv kev txiav txim.Lub router yog lub hub ntawm Is Taws Nem, "tub ceev xwm tsheb."Tam sim no, routers tau siv dav hauv txhua qhov chaw ntawm lub neej, thiab ntau yam khoom ntawm cov qib sib txawv tau dhau los ua lub zog tseem ceeb hauv kev paub txog ntau yam kev sib txuas hauv nruab nrab ntawm lub cev, kev sib txuas hauv nruab nrab ntawm lub cev, thiab cov pob txha caj qaum thiab cov kev pabcuam hauv Internet.Qhov sib txawv tseem ceeb ntawm routing thiab keyboards yog qhov hloov pauv tshwm sim ntawm txheej thib ob ntawm OSI siv qauv (cov ntaub ntawv txuas txheej), thaum routing tshwm sim ntawm peb txheej, txheej txheej network.Qhov sib txawv no txiav txim siab tias qhov kev sib txuas thiab kev hloov pauv yuav tsum siv cov ntaub ntawv tswj sib txawv hauv cov txheej txheem ntawm kev txav cov ntaub ntawv, yog li ob txoj hauv kev kom ua tiav lawv cov haujlwm sib txawv.
Router (Router), tseem hu ua gateway device (Gateway), yog siv los txuas ntau qhov kev sib cais sib cais.Lub npe hu ua logical network sawv cev rau ib lub network lossis subnet.Thaum cov ntaub ntawv raug xa los ntawm ib lub subnet mus rau lwm qhov, nws tuaj yeem ua tiav los ntawm kev ua haujlwm ntawm lub router.Yog li ntawd, lub router muaj lub luag haujlwm ntawm kev txiav txim qhov chaw nyob hauv lub network thiab xaiv txoj kev IP.Nws tuaj yeem tsim kev sib txuas yooj yim hauv ib puag ncig kev sib txuas ntawm ntau lub network.Nws tuaj yeem txuas ntau yam subnets nrog cov ntaub ntawv sib txawv kiag li thiab cov txheej txheem nkag mus rau hauv xov xwm.Lub router tsuas yog lees txais qhov chaw nres tsheb lossis Cov ntaub ntawv ntawm lwm cov routers yog ib hom khoom sib txuas ntawm cov txheej txheem network.
Post lub sij hawm: Aug-20-2021