professional Look at Net 2.2

professional Look at Net is a simple application that is designed to teach you the basics of computer networks at the low level; at the level of Ethernet frames and IP (Internet Protocol) packets, by capturing network traffic, decoding encapsulated in the IP packets of a higher level protocols: TCP, UDP, and ICMP. It also focus on the basics of network security; the search for remote computers open to attack ports, etc.