From HHD Software:
Network Monitor allows you to capture, display, analyze, record and replay all the data your computer exchanges with network via IP connections. It can be successfully used for monitoring behavior of LAN and Internet applications and services. You can find this network monitor useful while developing network software, hardware and services, writing your device drivers and protocols.
Network Monitor can be handy for the LAN administrators and help them to explore hidden traffic data of any network applications including the one originated by viruses and trojan programs. You can also use network monitor for security purposes to detect any restricted user activity.