Host 1 is trying to communicate with Host 2． The e0 interface on Router C is down． Which of the following are true?
- 1、
【正确答案】
1、A,D
【答案解析】因为RC的e0口down，所以主机1的数据包到达RC后，RC向主机返回一个icmp的目的地不可达信息。