Nokia Certified Network Associate – IP/MPLS Services — Question 1

Which BGP message type is used to verify connectivity during and after BGP session establishment?

Answer options

• A. Hello
• B. Update
• C. Open
• D. Keep-Alive

Correct answer: D

Explanation

The correct answer is D, Keep-Alive, as this message type is specifically designed to maintain the BGP session and verify that the connection is still active. Options A (Hello), B (Update), and C (Open) serve different purposes in BGP, such as initiating sessions or exchanging routing information, but they do not serve the role of maintaining ongoing connectivity.