Q8. Which of the following statements is true about Authentication in Cisco AAA environment?
A. It is used to prevent any virus from entering the network.
B. It is used to determine the identity of users for giving access to the network.
C. It is used to measure of utilization of network resources such as number of hours of usage, Kilo bits of data transfer for billing or accountability.
D. It is used to control the extent to which a user is allowed access to network resources.
Correct Answer: B
Explanation:
AAA stands for Authentication, Authorization, and Accounting.
Authentication: Authentication is used to determine whether a user is allowed access to network at all. The primary purpose of authentication is to prevent intruders from getting access to the network.
Authorization: The purpose of authorization is to determine the extent to which a user is allowed access to the network resources. Authorization helps in limiting the resources of a network only to authorized individuals, allowing various levels of accessibility to network resources.
Accounting: Accounting is basically to keep track of network resource usage. The usage statistics may include such things as number of hours of usage, kilobits of data transferred etc. It will also be useful to trace the activities of a user at a later date for troubleshooting or investigative purposes.
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