Douglas Comer, a widely read author and leading expert in computer networking, builds a comprehensive picture of the technologies on which Internet applications are based.

This edition begins with application programs, which include web and chat services, and a new chapter on routing in the Internet has been included.

The book provides an excellent tour that starts from the lowest levels of packet transmission and reaches the highest levels of application software, explaining how the underlying technologies provide services and how Internet applications use these services.

[Excerpt from the text on the back cover of the edition]