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This article mainly introduces what protocol ICMP refers to. It is very detailed and has a certain reference value. Friends who are interested must read it!

ICMP protocol is Internet control message protocol. It is a subprotocol of the TCP/IP protocol suite, which is used to transmit control messages between IP hosts and routers. Although these control messages do not transmit user data, they play an important role in the transmission of user data.

ICMP (Internet Control Message Protocol) is the Internet control message protocol.

It is a subprotocol of the TCP/IP protocol suite, which is used to transmit control messages between IP hosts and routers. The control message refers to the message of the network itself, such as whether the network is unreachable, whether the host is reachable, whether the route is available, and so on. Although these control messages do not transmit user data, they play an important role in the transmission of user data.

ICMP uses the basic support of IP as if it were a higher-level protocol, but ICMP is actually a part of IP and must be implemented by each IP module.

How it works:

ICMP provides consistent and understandable error reporting information. The error message sent is returned to the device that sent the original data, because only the sending device is the logical receiver of the error message. The sending device can then determine the type of error based on the ICMP message and determine how to better resend the failed packet. But the only function of ICMP is to report problems rather than correct errors, and the task of correcting errors is done by the sender.

We often use the ICMP protocol in the network, such as the Ping command we often use to check that the network is not connected (both in Linux and Windows). This "Ping" process is actually the process of working the ICMP protocol. Other network commands, such as the Tracert command that tracks routes, are also based on the ICMP protocol.

The above is all the contents of the article "what Protocol does ICMP refer to". Thank you for reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!

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