What is a static IP address and what is it used for? If you've ever needed a computer or device on your network to always be reachable at the same address, you need that machine to be static.

Use the static keyword for functions and variables at the file level when you want them to behave like quasi-globals, being accessible everywhere within the file but hidden from the outside. See?

Declare static classes and static members of a class to improve performance of your .NET applications.

Almost everyone has a home network, which means almost everyone should understand the basics of static and dynamic IP addresses, just in case.