A.IP,ICMP,ARP,UDP B.TCP,ICMP,UDP,ARP C.IP,ICMP,ARP,RARP D.UDP,IP,ICMP,RARP247
A.沒有域名主機(jī)不可能上網(wǎng) B.一個(gè)IP地址能對(duì)應(yīng)一個(gè)域名 C.一個(gè)域名只能對(duì)應(yīng)一個(gè)IP地址 D.域名只要不和他主機(jī)同名即可
A.127.O.O.1 B.125.96.209.5 C.129.196.29.45 D.202.96.73.1