This tool allows network admins to 'scan' any TCP\\IP based network for possible security holes. There are 2 types of scans that can be performed: Service Scans and Port Scans. A Service Scan searches a remote system for some of the more common services that may be running. A Port Scan scans a range of TCP\\IP ports to determine which are accepting connections and could possibly be used to breach that remote systems security. GSNetScan also has a feature called Netmap which allows you to scan a subnet to determine which nodes show up as being 'alive'."