Systems and methods to passively scan a network are disclosed herein. The passive scanner sniffs a plurality of packets traveling across the network. The passive scanner analyzes information from the sniffed packets to build a topology of network devices and services that are active on the network. In...http://www.google.fr/patents/US7761918?utm_source=gb-gplus-shareBrevet US7761918 - System and method for scanning a network
