Qhov tseem ceeb sib txawv ntawm atxheej-2 hloovthiab a txheej-3 hloovyog tias txheej txheej txheej txheem ua haujlwm txawv.Ib txheej-2 hloov ua haujlwm ntawm cov ntaub ntawv txuas txheej, thiab txheej-3 hloov ua haujlwm ntawm txheej txheej network.

Nws tuaj yeem nkag siab yooj yim li txheej 2 hloov.Koj tuaj yeem xav tias nws tsuas muaj qhov hloov pauv, uas yog hais, nws tuaj yeem ua cov ntaub ntawv thav ntawv xwb.Ntxiv nrog rau kev ua haujlwm ntawm txheej 2 hloov, txheej 3 hloov kuj tseem muaj txheej txheej 3 routing muaj nuj nqi, uas txhais tau tias nws tuaj yeem ua cov ntaub ntawv.Hnab.

(1)Txheej 2 hloov ua hauj lwm ntawm txheej thib ob ntawm cov ntaub ntawv txuas txheej ntawm OSI siv qauv.Lub luag haujlwm tseem ceeb suav nrog qhov chaw nyob ntawm lub cev, kev kuaj xyuas qhov yuam kev, ntu ntu, thiab tswj kev ntws.

(2) Atxheej-3 hloovyog ib qho khoom siv nrog txheej-3 hloov kev ua haujlwm, uas yog, txheej-2 hloov nrog txheej-3 routing muaj nuj nqi, tab sis nws yog cov organic ua ke ntawm ob, tsis yog ib qho router cuab yeej hardware thiab software Superimposed ntawm LAN hloov. .