JNCIS-ENT: Juniper Networks Certified Specialist – Enterprise Routing and Switching (2023) — Question 45

You want to provide reachability to your data center by advertising its subnet throughout your upstream peer AS. However, you do not want this prefix advertised any further.
Which BGP community value would be used to meet this requirement?

Answer options

• A. no-advertise
• B. no-export
• C. no-export-subconfed
• D. 65512 - 65535

Correct answer: B

Explanation

The correct answer is B, no-export, which prevents the advertised prefix from being sent to any other AS beyond the immediate peer. Option A, no-advertise, would not allow the prefix to be advertised to the peer AS at all, while option C, no-export-subconfed, is specifically for use within a confederation and not applicable here. Option D does not represent a BGP community value that restricts advertisement.