Submitted by Andy Gavin on Sat, 2006-08-12 23:27
When you are connected to a wireless network or are in the office and need to diagnose a problem there are various techniques and tools to probe the network. First of all it is possible to determine from the mac address, the manufacturer of the network card in a machine. The first three bytes of the mac address is known as the OUI: the IEEE keeps a searchable public database of these. A mac address for a machine can be found using ARP.