Learning Objectives

After successfully completing this section, you should be able to

  1. explain what ICMP is and what it does.
  2. explain where and how ICMP is used in some network applications.

Learning Tasks

Required:

  1. Watch the slideshow for this section.
  2. Study Section 5.6, ICMP: The Internet Control Message Protocol, in the textbook.

Terms and Topics

Section 6 – ICMP: The Internet Control Message Protocol

Internet group management protocol (IGMP)
IGMP message types
ICMP type 8 code 0 message
Source quench message

Ping

Leading Questions

  1. What is the Internet communication message protocol (ICMP)?
  2. What is ICMP used for?
  3. How is ICMP used by the well-known ping program?
  4. How can an ICMP source quench message be used by a router in network congestion control?