Cybersecurity Glossary: Terms Explained in Plain English | TecnetOne

What Is a Domain Controller? Definition | TecnetOne Glossary

Written by Tecnet One | Oct 6, 2026, 11:30:54 PM

A domain controller is the server that manages the accounts, passwords and permissions of every user and device on a Windows network through Active Directory. It's the most sensitive asset in a company, because whoever controls it controls every account and every computer on the domain.

How TecnetOne handles it: Azure Managed Services

domain controller, Active Directory, AD, AD DS