Lecture 14: The Network Layer

IPv4 packet format

Finally! This lecture covers the glue that holds the entire internet together. After some discussion of the theoretical possibilities available in a network-layer protocol, several aspects of IP will be examined. The addressing mechanisms in IP are more complex than at any other level -- there is much more to those 4 dotted pairs of numbers than just 4 dotted pairs of numbers. We will also look at the network packet format, fragmenting and the ICMP protocol.

Lesson Objectives

By the end of this lesson, the student will be able to: