A.集中在數(shù)據(jù)鏈路層 B.只能根據(jù)MAC地址對數(shù)據(jù)進(jìn)行交換 C.集中在網(wǎng)絡(luò)層
A.1-126/8 B.128-191/16 C.192-223/24 D.224-239/8
A.10.1.1.1 B.172.16.0.1 C.192.168.1.100 D.100.100.100.100