Came across a document from Cisco that deals with hacking switches. It covers a number of different attacks and gives some tips on how to protect your self. Contains some good explanations on how arp flooding and vlan hopping attacks work. Itís not an easy read so if youíre like me you might have to read a few parts over once or twice to grasp some of the concepts.

Its 752kb so it might take a minute or two if youíre on 56k.