A.160.52.63.8 B.200.36.54.9 C.80.54.2.6 D.112.26.9.4
A.協(xié)議數(shù)據(jù)單元B.傳輸層C.網(wǎng)絡(luò)層D.數(shù)據(jù)鏈路層
A.PAN B.WAN C.LAN D.MAN