A technique is provided for dividing a plurality of switch ports into trusted ports and untrusted ports. The trusted ports are those ports that are coupled either directly or via one or more additional switches to a trusted computing device. Filters are applied on each untrusted port to allow the untrusted...http://www.google.se/patents/US7305549?utm_source=gb-gplus-sharePatent US7305549 - Filters to isolate untrusted ports of switches
