ANS-C01 Network Management and Operations Practice Question
A company is using AWS Direct Connect to connect its on-premises data center to AWS. The connection is up, but the network team cannot reach resources in a VPC. The virtual interface is in the 'available' state, and BGP session is established. What should the team check next?
⚠ Common exam trap
Test-takers frequently assume a working BGP session guarantees end-to-end connectivity, but BGP only ensures the routing protocol is exchanging prefixes; the VPC route table must still have the propagated routes or a static route to direct traffic to the virtual private gateway.
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
✓
Check the VPC route tables for propagated routes
Since the Direct Connect physical link is up, the virtual interface is available, and the BGP session is established, the issue lies in the routing of traffic within AWS. The most likely cause is that the VPC route tables do not contain the necessary routes (either static or propagated from the Direct Connect virtual private gateway) to direct traffic back to the on-premises network. Checking the VPC route tables for propagated routes is the correct next step to ensure the on-premises CIDR is being advertised and accepted.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Check the on-premises firewall rules
Why it's wrong here
The BGP session is established, so the firewall allows BGP; the issue is likely in route propagation.
- ✗
Check the BGP authentication
Why it's wrong here
BGP session is established, so authentication is correct.
- ✓
Check the VPC route tables for propagated routes
Why this is correct
The Direct Connect virtual interface routes must be propagated to the VPC route tables.
- ✗
Check the Direct Connect physical link status
Why it's wrong here
The connection is up, so the physical link is fine.
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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.