Network Tools : TCP\IP Netstat Network Command-Line Utility
Netstat is Short for Network Statistics and is a Command-line Utility or more precisely a Console Application. As it's Name suggests, it displays Protocol and Network Statistics for all Network Interfaces attached to the Computer. A Network Interface, more commonly referred to as a Network Interface Card is any piece of Hardware that allows the Computer to connect to a Network. The two most common types are a USB Wireless Adapter and a PCI Network Card (NIC).
Netstat's main scopes are TCP (Transmission Control Protocol), UDP (User Datagram Protocol), IP (Internet Protocol) and ICMP (Internet Control Message Protocol), for both IPv4 and IPv6.
The entire How-to\Article can be found here.