AWS Certified Advanced Networking – Specialty (ANS-C00) — Question 148

Your company has two DX locations. You need to configure one link as passive. What should you configure in your router to set that link as the passive link.

Answer options

• A. Set a higher MED.
• B. Configure AS_PATH Prepending on the link.
• C. Advertise a network with a higher CIDR.
• D. Call your service provider and have the ASN changed for that link.

Correct answer: B

Explanation

The correct answer is B because configuring AS_PATH Prepending effectively influences the path selection by making the route less preferred. Options A, C, and D don't achieve the goal of designating a link as passive; a higher MED may not necessarily make a link passive, and changing the CIDR or ASN will not directly set a link to passive.