A.網(wǎng)絡(luò)接口層B.網(wǎng)際層C.傳輸層D.應(yīng)用層
A.RJ-45 B.AUI C.BNC-T D.NNI
A.物理層 B.數(shù)據(jù)鏈路層 C.網(wǎng)絡(luò)層 D.傳輸層