ONU (Optical Network Unit) thiab router yog ob lub network sib txawv uas ua haujlwm sib txawv hauv lub network.
ONU, tseem hu ua optical modem, yog ib qho khoom siv hauv fiber ntau optic access networks (FTTH). Nws lub luag haujlwm tseem ceeb yog los hloov cov teeb pom kev kub ceev rau hauv cov teeb liab digital uas tuaj yeem lees paub los ntawm cov khoos phis tawj los txhawb kev sib txuas hauv Is Taws Nem siab. ONU feem ntau suav nrog Ethernet chaw nres nkoj thiab txhawb nqa kev sib txuas wireless, ua rau lub network hauv tsev lossis chaw ua haujlwm tsis muaj kev cuam tshuam.
Ib lub router yog lub rooj vag khoom siv uas txuas ob lossis ntau lub network. Nws tuaj yeem nyeem cov ntaub ntawv chaw nyob hauv txhua pob ntawv thiab txiav txim siab yuav kis cov pob ntawv no li cas. Routers tuaj yeem nkag siab txog cov txheej txheem sib txawv, xws li Ethernet lossis TCP / IP, thiab tuaj yeem txheeb xyuas qhov chaw nyob ntawm cov ntaub ntawv pob khoom los ntawm ntau lub network, hloov tsis yog TCP / IP network chaw nyob rau TCP / IP chaw nyob, thiab tom qab ntawd xa cov ntaub ntawv pob ntawv mus rau qhov chaw xaiv. raws li qhov kev xaiv zoo tshaj plaws.
Hauv cov ntsiab lus, ONU feem ntau ua haujlwm ntawm kev hloov pauv fiber ntau optic teeb liab rau hauv cov teeb liab digital, thaum routers xa cov ntaub ntawv ntawm thaj chaw dav (WAN) thiab hauv cheeb tsam hauv cheeb tsam network (LAN), xaiv txoj kev xa cov ntaub ntawv zoo tshaj plaws, thiab ua haujlwm xws li chaw nyob network. translation (NAT).