A.數(shù)據(jù)鏈路層 B.傳輸層 C.應(yīng)用層 D.網(wǎng)絡(luò)層
A.201.161.3.120 B.172.18.30.165 C.213.116.132.9 D.217.18.32.11
A.RIP B.ARP C.OSPF D.BGP