How Internet Control Message Protocol (ICMP) Works?

ICMP stands for Internet Control Message Protocol. When IP packets send from a computer to a destination computer on the Internet, it needs to travel via a number of gateways. Each gateway on the Internet will send the packets to the next gateway according to the routing table.

  • ICMP(Part 4) - How ICMP Messages Are Sent
    September 20, 2011

    As we learned before that ICMP was designed as a way to send error and diagnostic messages in an IP inter-network.ICMP messages are identified by "type" numbers.Each ICMP message also has a "code" num...

  • ICMP (Part 3) - Concept Consolidation
    September 19, 2011

    Now let's consolidate the concept of ICMP from what we discussed before. When a gateway on the Internet cannot pass the data packet to the next gateway, it will send a ICMP reply message (according to...

  • ICMP (Part 2) - Introduction
    September 18, 2011

    We learned that when a IP packets sent from a computer to a destination computer on the Internet, it needed to travel via a number of gateways. Each gateway on the Internet will send the packet t...

  • ICMP (Part 1) - Basic Concept
    September 18, 2011

    ICMP stands for Internet Control Message Protocol.When IP packets send from a computer to a destination computer on the Internet, it needs to travel via a number of gateways. Each gateway on the Inter...