Question

Which is the most common method used to authenticate users on private and public computer networks?

Answer 1

User names and passwords are the most common method used to authenticate users on private and public computer networks.

Answer 2

The most common method is using a username and a password and almost everyone has that on their PC by default regardless of the operating system. More advanced would be having special codes generated that only last for a while and change but these are used for things that require higher login protection. A regular username and password will do.