A.網(wǎng)絡接口層 B.網(wǎng)絡層 C.傳輸層 D.應用層
A.物理層 B.網(wǎng)絡層 C.傳輸層 D.數(shù)據(jù)鏈路層
A.202.113.0.0 B.202.113.78.1 C.202.113.78.0 D.202.113.78.255