A.10% B.20% C.30% D.90%
A.硬件地址 B.位傳輸 C.電平 D.物理接口
A.物理層、數(shù)據(jù)鏈路層、網(wǎng)絡(luò)層、傳輸層 B.數(shù)據(jù)鏈路層、網(wǎng)絡(luò)層、傳輸層、會(huì)話層 C.會(huì)話層、表示層、應(yīng)用層 D.數(shù)據(jù)鏈路層、網(wǎng)絡(luò)層、傳輸層