ANS-C01 Network Management and Operations Practice Question
A company uses AWS Direct Connect to connect its on-premises data center to a VPC. The network team notices that traffic is intermittently dropping and the BGP session between the on-premises router and the AWS Direct Connect virtual interface goes down. Which configuration should be checked first to resolve this issue?
⚠ Common exam trap
The trap is assuming that simply increasing timers will solve the flapping; the actual fix is ensuring timers match.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Ensure the BGP hold timer values are consistent on both ends
Ensure the BGP hold timer values are consistent on both ends. A mismatch in BGP hold timers can cause the BGP session to flap intermittently. Configuring consistent hold times on both routers stabilizes the session. Option B is incorrect because increasing the keepalive timer may postpone failure detection but does not fix the root cause. Option C is incorrect because disabling BGP authentication is unnecessary and insecure. Option D is incorrect because enabling MD5 authentication is optional and unrelated to the flapping.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Ensure the BGP hold timer values are consistent on both ends
Why this is correct
Correct. Consistent BGP hold timers on both ends prevent session timeouts due to mismatch.
- ✗
Increase the BGP keepalive timer on the on-premises router to 90 seconds
Why it's wrong here
Incorrect. Increasing the keepalive timer delays detection but does not address the mismatch; consistency is required.
- ✗
Disable BGP authentication on the virtual interface
Why it's wrong here
Incorrect. Disabling BGP authentication is not a recommended fix and does not resolve timer mismatch.
- ✗
Enable BGP MD5 authentication on the on-premises router
Why it's wrong here
Incorrect. Enabling MD5 authentication is unrelated to flapping caused by timer mismatch.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This ANS-C01 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the ANS-C01 exam.