Acronym for Internet Control Message Protocol defined in 
RFC:792
These are messages generated by an IP stack. They have an IP protocol type of 0x01.
The different types of ICMP are:
| ICMP Type | Description |
| 0 | ICMP Echo reply |
| 1 | |
| 2 | |
| 3 | DestinationUnreachable |
| 4 | SourceQuench? |
| 5 | ICMPRedirect |
| 6 | AlternativeHostAddress |
| 7 | |
| 8 | ICMP Echo Request |
| 9 | RouterAdvertisement? |
| 10 | RouterSelection? |
| 11 | TimeToLiveExceeded |
| 12 | ParameterProblem? |
| 13 | ICMPTimestamp |
| 14 | ICMPTimestampReply |
| 15 | InformationRequest? |
| 16 | InformationReply? |
| 17 | AddressMaskRequest |
| 18 | AddressMaskReply |
| 19-29 | |
| 30 | Traceroute |
| 31 | DatagramConversionError? |
| 32 | MobileHostRedirect? |
| 33 | IPv6 WhereAreYou? |
| 34 | IPv6 IAmHere? |
| 35 | MobileRegistrationRequest? |
| 36 | MobileRegistrationReply? |
| 37 | DomainNameRequest? |
| 38 | DomainNameReply? |
| 39 | SKIP |
33 pages link to ICMP:
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