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What is the function of ICMP?

Updated: 12/13/2022
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To handle error messages when a message does not reach it's destination.

To announce timeouts and network congestion.

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Q: What is the function of ICMP?
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Related questions

What protocol does ping use?

"Ping uses the Internet Control Message Protocol (ICMP) Echo function which is detailed in RFC 792"http://www.activexperts.com/activsocket/tutorials/ping/So the short answer is that it uses the ICMP protocol.


What transport layer protocol does ping use?

Assuming IPv4 ICMP. Ping uses IP for transport. Ping in itself is an "Echo Request", which is a function of the ICMP protocol. The IP Packet will carry the ICMP protocol from end-to-end. ICMP has a protocol number of 1, so the "Protocol" field in the IPv4 header will contain "1" as a reference to the ICMP payload. For IPv6, ICMPv6 is used, and the transport will be IPv6.


Which port is used by ICMP?

There really is no "port" for icmp but there is a icmp code. If you are looking for the icmp code for echo-reply it is 0 and the echo is 8 For an access list you could do the following: permit icmp any any echo-reply permit icmp any any echo Or the same using the icmp code permit icmp any any 0 permit icmp any any 8


What port is used for icmp echo re quest?

There really is no "port" for icmp but there is a icmp code. If you are looking for the icmp code for echo-reply it is 0 and the echo is 8 For an access list you could do the following: permit icmp any any echo-reply permit icmp any any echo Or the same using the icmp code permit icmp any any 0 permit icmp any any 8


What port does icmp belong to?

ICMP does not have a port like TCP and UDP.


Why is it that an ICMP packet does not have source and destination port?

Because ICMP is on the network layer


Which ICMP message contain part of the ip datagram?

All ICMP Error Messages


Where the icmp request are originated?

icmp request is orginated on the OSI network layer with ip protocol.


Why filtering ICMP traffics by ACLs is not advised?

Because ICMP traffic, notably ICMP ECHO REQUEST-0 and ECHO REPLY-8 are used in network diagnostic sequences.


Which protocol should be allowed when not able to ping a remote device residing behind a firewall?

ICMP is the internet control access protocol . ICMP is the plrotocol that should be allowed when not able to ping a remote device residing behind a firewall. ICMP is the protocol of network layer.


What is the response if a host sends a ICMP to a default gateway?

If devices on a network are properly configured, a host sending ICMP to a default gateway must receive a reply. ICMP simply means ping.


Does ICMP operate at the Transport layer?

no