Cov pob hluav taws xob tuaj yeem xa cov ntaub ntawv nruab nrab ntawm ntau qhov chaw nres nkoj hauv tib lub sijhawm. Txhua qhov chaw nres nkoj tuaj yeem suav tias yog ntu kev ywj pheej ntawm lub cev (CEEB TOOM: Tsis IP network ntu txuas nrog nws txaus siab rau txhua tus bandwidth ntawm nws tus kheej, tsis muaj kev sib tw nrog lwm cov khoom siv rau kev siv. Thaum node xa cov ntaub ntawv rau ntawm D, Node B tuaj yeem xa cov ntaub ntawv xa cov ntaub ntawv rau tag nrho C, thiab ob qho tib si sib kis tau txaus siab rau tag nrho cov network thiab muaj lawv tus kheej sib txuas. Yog tias 10Mbps Ethernet hloov tau siv tau ntawm no, tag nrho cov kev hloov pauv tau sib npaug nrog 10Mbps, tag nrho cov Hub yuav tsis pub tshaj 10Mbps. Hauv ntej, hloov yog lub network ntaus ntawv raws Mac chaw nyob uas tau lees paub uas tuaj yeem encapsulate thiab xa cov ntaub ntawv thav ntawv. Cov hloov pauv tuaj yeem "Kawm" Mac chaw nyob thiab khaws cia rau hauv qhov chaw nyob sab hauv, tsim cov ntaub ntawv hloov mus ib ntus los ntawm cov chaw nyob mus rau qhov chaw nyob.
