Which of the following is the MOST likely reason for the problem?

A technician has finished configuring AAA on a new network device. However, the technician is unable to log into the device with LDAP credentials but is able to do so with a local user account.

Which of the following is the MOST likely reason for the problem?
A . Username is misspelled is the device configuration file
B . IDS is blocking RADIUS
C . Shared secret key is mismatched
D . Group policy has not propagated to the device

View Answer

Answer: C

Explanation:

AAA through RADIUS uses a Server Secret Key (a shared secret key). A secret key mismatch could cause login problems.

Authentication, authorization, and accounting (AAA) allows anetwork to have a single repository of user credentials. A network administrator can then, for example, supply the same credentials to log in to various network devices (for example, routers and switches). RADIUS and TACACS+ are protocols commonly used to communicate with an AAA server.