Implementing and Operating Cisco Enterprise Network Core Technologies (ENCOR) — Question 644

An engineer must configure router R1 to validate user logins via RADIUS and fall back to the local user database if the RADIUS server is not available. Which configuration must be applied?

Answer options

• A. aaa authentication exec default radius local
• B. aaa authentication exec default radius
• C. aaa authorization exec default radius local
• D. aaa authorization exec default radius

Correct answer: A

Explanation

Option A is correct because it sets up RADIUS as the primary method for authentication and specifies the local database as a fallback. Option B does not include the local database for fallback, making it insufficient. Options C and D focus on authorization rather than authentication, which is not relevant to the question.