A.RARP B.ARP C.IP D.ICMP
A.UDP B.ICMP C.ARP D.RARP
A.中繼器是工作在物理層的設(shè)備 B.集線器和以太網(wǎng)交換機(jī)工作在數(shù)據(jù)鏈路層 C.路由器是工作在網(wǎng)絡(luò)層的設(shè)備 D.網(wǎng)橋能隔離網(wǎng)絡(luò)層廣播