Info about how to find out what port an application is using.

Can download TCPView off http://technet.microsoft.com/en-us/sysinternals/bb897437.aspx 
There are more information about the program on the page.

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Another method is to use the command "netstat" 
"netstat -nb" or "-nab" should give sufficient information.

Typing in Command Prompt, "netstat help" will tell you more functions. 

Displays protocol statistics and current TCP/IP network connections.

NETSTAT [-a] [-b] [-e] [-f] [-n] [-o] [-p proto] [-r] [-s] [-t] [interval]

  -a            Displays all connections and listening ports.

  -b            Displays the executable involved in creating each connection or listening port. In some cases well-known executables host multiple independent components, and in these cases the sequence of components involved in creating the connection or listening port is displayed. In this case the executable name is in [ ] at the bottom, on top is the component it called, and so forth until TCP/

It was an hour before midnight, three hours into the night shift with nine more to go. At his workstation in a small, fluorescent-lighted office space in Nanjing, China, Li Qiwen sat shirtless and chain-smoking, gazing purposefully at the online computer game in front of him. The screen showed a lightly wooded mountain terrain, studded with castle ruins and grazing deer, in which warrior monks milled about. Li, or rather his staff-wielding wizard character, had been slaying the enemy monks since 8 p.m., mouse-clicking on one corpse after another, each time gathering a few dozen virtual coins — and maybe a magic weapon or two — into an increasingly laden backpack.

The end of a 12-hour shift at Donghua Networks in Jinhua, China.

Multimedia

Video

The Wizards of Warcraft

Twelve hours a night, seven nights a week, with only two or three nights off per month, this is what Li does — for a living. On this summer night in 2006, the game on his screen was, as always, World of Warcraft, an online fantasy title in which players, in the guise of self-created avatars — night-elf wizards, warrior orcs and other Tolkienesque characters —