Which of the following is the primary purpose of access control in network security?

Access control is a fundamental aspect of network security that dictates who can access specific resources and what actions they can perform on those resources. This process is critical in preventing unauthorized access to sensitive data and ensuring that only authorized users can perform specific actions, such as viewing, editing, or deleting information. Access control can be implemented using various methods, including role-based access control (RBAC), discretionary access control (DAC), and mandatory access control (MAC). By managing access rights effectively, organizations can mitigate risks associated with data breaches and maintain compliance with regulatory standards. Why Other Options are Wrong: A) Monitoring network performance is not a direct purpose of access control; it is usually handled by network management tools. B) While encryption protects data, it is not the primary function of access control. D) Data backup is a separate function related to data recovery, not directly tied to access control. E) Managing network bandwidth involves Quality of Service (QoS) strategies, which are unrelated to access control mechanisms.