What is ICMPv4 (Internet Control Message Protocol version 4)?

Internet Control Message Protocol variant 4 aim is to examine and report the error to the source if any problem arises while transmitting the information. The ICMPv4 is a message-oriented protocol. It’s a protocol of version 4 of the TCP/IP protocol suite. ICMPv4 conveys an error report to the original source of the datagram. It has an 8-byte header and it has a variable size data section. ICMPv4 protocol is a network layer protocol. ICMPv4 message is secured in IP datagram before transmission to the data link layer. ICMPv4 is arranged into two kinds of error messages and query messages.