如果在安排路径的过程中遇到问题，互联网控制信息协议(ICMP)就把信息和错误报告向源主机发送。
If problems are encountered during routing, the Internet Control message Protoccol or ICMP sends messages and reports errors to the source host.
如果在安排路径的过程中遇到问题，互联网控制信息协议(ICMP)就把信息和错误报告向源主机发送。
If problems are encountered during routing, the Internet Control message Protoccol or ICMP sends messages and reports errors to the source host.
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