icmp传输ICMP是IP层的一个组成部分,在I P数据报内部被传输的。它传递差错报文以及其他需要注意的信息。一些ICMP报文把差错报文返回给用户进程。 -icmp transmission IP layer ICMP are an integral part of, in the IP datagram to be transmitted over the internal. It conveys the error message, as well as other informatio