AWS Certified Advanced Networking – Specialty (ANS-C00) — Question 198

You are a network engineer at a company that just purchased a DX connection. You ensured your equipment met all of the technical requirements, you have verified with your AWS account manager and your colocation provider that everything is connected, and all of your information is correct. For some reason, the link does not operate correctly.
What could be the problem?

Answer options

• A. The CAT6 cable is frayed.
• B. Autonegotiation is enabled.
• C. You are using 802.1q VLANs instead of 802.1w.
• D. BFD is disabled.

Correct answer: B

Explanation

The correct answer is B because having autonegotiation enabled can lead to mismatched configurations between devices, causing connectivity issues. Option A may affect physical connectivity but does not directly cause the described operational problem. Option C is incorrect because the use of 802.1q VLANs is standard and does not directly relate to the issue at hand. Option D is also not the cause, as disabling BFD would not typically result in the link being non-operational if all other configurations are correct.