A.靜態(tài)NAT B.多層NAT C.網(wǎng)絡 D.數(shù)據(jù)鏈路
A.傳輸層B.物理層C.網(wǎng)絡層D.數(shù)據(jù)鏈路層
A.協(xié)議網(wǎng)關(guān)B.公用電話交換網(wǎng)C.傳輸網(wǎng)D.IP網(wǎng)