What are the different access control models used in network security protocols?

The different access control models used in network security protocols are:

1. Mandatory Access Control (MAC): This model is based on a hierarchical system where access to resources is determined by the system administrator. It uses labels and clearances to enforce access restrictions.

2. Discretionary Access Control (DAC): In this model, the owner of a resource has the authority to control access to it. The owner can grant or revoke access permissions to other users or groups.

3. Role-Based Access Control (RBAC): RBAC assigns permissions to users based on their roles within an organization. Access is granted based on predefined roles and responsibilities, making it easier to manage access control in large organizations.

4. Attribute-Based Access Control (ABAC): ABAC uses attributes such as user attributes, resource attributes, and environmental attributes to determine access permissions. It allows for more flexible and dynamic access control policies.

5. Rule-Based Access Control (RBAC): RBAC uses a set of rules defined by the system administrator to determine access permissions. These rules are based on conditions and actions, allowing for more fine-grained control over access.

6. Discretionary Mandatory Access Control (DMAC): DMAC combines elements of both MAC and DAC models. It allows users to have some control over access to their resources while also enforcing mandatory access control policies.

These access control models provide different levels of security and flexibility, allowing organizations to choose the most suitable model based on their specific requirements.