Access Control List

An Access Control List (ACL) is a security list that sets rules on who can use certain files, programs, or networks. Each rule allows or denies specific actions, such as opening, editing, or sharing data.

ACLs give businesses a clear way to manage access. For example, a company may let team leaders update reports while limiting general staff to view-only rights. This keeps information safe and prevents unauthorized use.

ACLs appear in many places—operating systems, servers, and even routers. They help filter network traffic, protect sensitive details, and reduce risks of data breaches.