The process of name resolution is very important in computer networks.

That unsolved problem keeps him awake at night.

That unsolved case keeps him awake at night.

He thinks that war is a necessary evil.

Do you understand the necessity of this project?

They learned about the least common multiple in math class.

I live with the minimum amount of things.

That information is unnecessary.

That information is completely unnecessary.

A new approach is needed to solve this set of problems.