如果一台路由器发生了拥塞，那么它应该向数据报的源主机发送的ICMP报文为( )。
A．源站抑制报文
B．超时抑制报文
C．路由控制报文
D．重定向报文
参考答案：A
解析： 为了控制拥塞，IP软件采用“源站抑制”技术，利用ICMP源抑制报文抑制源主机发送IP数据报的速率。路由器对每个接口进行密切监视，一旦发现拥塞，立即向相应源主机发送ICMP源抑制报文。
B: Yes. 1. __________ A: This is Wang Chun. Are you free this Sunday evening? B: Yes. 2. __________ A: I’ve got three tickets to Han Hong’s concert. Would you like to go with me? B:3. __________ She is my favorite singer. Thanks for your invitation. When and where shall we meet? A: 4. __________ B: Could you please get there earlier? I want to buy some flowers for her. A: 5. __________ Shall we go to the flower shop to buy them? B: Sounds good. See you later. A: See you. |