Exam AWS Certified Advanced Networking - Specialty ANS-C01 topic 1 question 144 discussion

Exam question from Amazon's AWS Certified Advanced Networking - Specialty ANS-C01

Question #: 144
Topic #: 1

[All AWS Certified Advanced Networking - Specialty ANS-C01 Questions]

A company has two AWS Direct Connect links. One Direct Connect link terminates in the us-east-1 Region, and the other Direct Connect link terminates in the af-south-1 Region. The company is using BGP to exchange routes with AWS.

How should a network engineer configure BGP to ensure that af-south-1 is used as a secondary link to AWS?

A. • On the Direct Connect link to us-east-1, configure BGP peering to use community tag 7224:7100
• On the Direct Connect link to af-south-1, configure BGP peering to use community tag 7224:7300
• On the Direct Connect BGP peer to us-east-1, set the local preference value to 200
• On the Direct Connect BGP peer to af-south-1, set the local preference value to 50
B. • On the Direct Connect link to us-east-1, configure BGP peering to use community tag 7224:7300
• On the Direct Connect link to af-south-1, configure BGP peering to use community tag 7224:7100
• On the Direct Connect BGP peer to us-east-1, set the local preference value to 200
• On the Direct Connect BGP peer to af-south-1, set the local preference value to 50
C. • On the Direct Connect link to us-east-1, configure BGP peering to use community tag 7224:7100
• On the Direct Connect link to af-south-1, configure BGP peering to use community tag 7224:7300
• On the Direct Connect BGP peer to us-east-1, set the local preference value to 50
• On the Direct Connect BGP peer to af-south-1, set the local preference value to 200
D. • On the Direct Connect link to us-east-1, configure BGP peering to use community tag 7224:7300
• On the Direct Connect link to af-south-1, configure BGP peering to use community tag 7224:7100
• On the Direct Connect BGP peer to us-east-1, set the local preference value to 50
• On the Direct Connect BGP peer to af-south-1, set the local preference value to 200

Show Suggested Answer

Suggested Answer: B 🗳️

by Neo00 at July 25, 2023, 5:38 p.m.

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Certified101

Highly Voted 2 years ago

Selected Answer: B

B is correct

upvoted 8 times

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AzureDP900

Most Recent 7 months, 3 weeks ago

Selected Answer: B

The local preference value determines the relative importance of routes received from different BGP peers; a higher value indicates a more preferred path. By setting the local preference value to 50 on the Direct Connect peer to us-east-1 and 200 on the Direct Connect peer to af-south-1, the network engineer ensures that the af-south-1 link is preferred over the us-east-1 link unless the primary link fails. If the af-south-1 link goes down, BGP will use the us-east-1 link because it has a lower local preference value (50) than the af-south-1 link (200).

upvoted 1 times

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