Authentication
Authentication is a way of identifying a specific user or a specific group of users before giving access or permitting access to the network and its services. This local authentication is frequently used to administer security functions.
The process of Authentication includes each user having its own set of credentials to gain access to a particular network or its services. These credentials when entered are then compared to those entries stored in AAA Server’s Database and if the credentials match, then only the user is granted access based on the privilege level.
Configuring Basic Password Authentication in Cisco
The Access Control Passwords are generally used to restrict access to a certain network server along with its services for a specified group of users (hosts). The Authentication, Authorization, and Accounting (AAA) network services provide the framework or platform through which one can set up Access Control over their router or network server along with its services.