Netstat

Netstat is a network forensics tool built into Windows used to display information about the current network status of the box.

It displays:

• Active TCP connections
• ports the computer is listening on 
• Ethernet Stats
• IP routing table
• IP stats

By default it shows active TCP connections. 

Parameters: 

-a: All TCP connections and ports that the machine is listening on 

-e: Ethernet statistics

-n: displays active TCP connections

-o: Includes PID