Simulators, sniffers, etc

Textbook web sites

Donahoo and Calvert

On this textbook's web site you'll find code files associated with the examples in the book which may be a useful starting point for some projects. Also the errata file which corrects a small number of errors in the book.
http://cs.baylor.edu/~donahoo/practical/CSockets2/

Kurose and Ross

On the textbook web site you'll find some additional exercises, and some applets that illustrate some of the concepts we'll be talking about.
http://wps.pearsoned.com/ecs_kurose_compnetw_6/216/55463/14198700.cw/ .