Abstract: In a network in which a plurality of geographically distributed network access points are connected to a plurality of ports of a network switch, the invention provides a method of determining the location of a network access device within a LAN environment and/or the identity of network access devices or users active at a specified location. The method includes performing one or more SNMP queries on a plurality of ports of said network switch to produce a query output, processing the query output to determine what devices, and thus what users, are active at the different access points of the LAN.