This script lets you remove a fraction (determined by the slider) of the nodes, either at random, or targeting those with the highest degree (by checking the "intentional attack" checkbox). It reports on the number of nodes that remain in the largest connected component.

The network that you are attacking is the gnutella peer-to-peer filesharing network sampled by Clip2 in the summer of 2000.

To read more about network resilience:
Reka Albert , Hawoong Jeong & Albert-Laszlo Barabasi, Error and attack tolerance of complex networks
Nature 406, 378 - 382 (27 July 2000)

You may need to refresh to get the applet to pop up (and make sure you have pop up blockers disabled).
Tested on Java plug-in version 1.4+