What is ACL?

ACL stands for Access Control List. It is a fundamental security mechanism used to control access to resources in a computer system or network. An ACL specifies which users or groups are granted access to objects and what operations they are allowed to perform (e.g., read, write, execute). ACLs are commonly used in operating systems, file systems, network devices (routers, firewalls), and databases to enforce security policies and protect sensitive data.