What is the purpose of an access control list (ACL)?

An access control list (ACL) is primarily utilized to specify which individuals or entities are authorized to access certain resources within a system or network. This is crucial for maintaining security, as it establishes permissions and restrictions for users, ensuring that only those with the appropriate rights can interact with specific data or functionalities.

The use of ACLs is essential in environments where sensitive data or critical systems exist. They help prevent unauthorized access, protect confidential information, and minimize the risk of data breaches. By explicitly defining access rights, ACLs also aid in compliance with various regulations and standards regarding data security.

The other options relate to different aspects of data management and security. Creating backups is a critical process for data recovery but does not directly pertain to controlling access. Notifying users about system updates is important for maintaining the overall functionality of a system, but it does not involve access control. Monitoring security camera footage is a part of physical security measures, which are distinct from the digital access control that ACLs provide.