How to verify running port of windows system

netstat -ao |find “Port number”

How to shutdown windows system from command prompt

shutdown

How to get task list and process ID of running programs on windows

Just type tasklist on your command prompt.

How to get MAC address of windows system.

Just type below command at your DOS command promt:( That will work in XP and above)
getmac – quickly grab just the mac addresses of your NICs without having to use ipconfig /all