A.網(wǎng)絡(luò)層,物理層 B.物理層,數(shù)據(jù)鏈路層 C.數(shù)據(jù)鏈路層,物理層 D.傳輸層,網(wǎng)絡(luò)層
A.2 B.4 C.8 D.16
A.802.11a B.802.1Q C.802.3 D.802.11b