ANS-C01 Network Management and Operations Practice Question
A company uses AWS Direct Connect to connect its data center to a VPC. The VIF is up, and the BGP session is established. However, the on-premises router cannot ping the VPC's private IP addresses. Which configuration is most likely missing?
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
✓
The VPC route table does not have a route pointing to the Virtual Private Gateway for the on-premises CIDR.
For traffic to reach VPC private IPs, the VPC route table must have a route pointing to the Virtual Private Gateway (VGW) for the on-premises CIDR. Even with BGP up, without this route, traffic won't be sent to the VGW.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The Direct Connect virtual interface is in the wrong VLAN.
Why it's wrong here
A VLAN mismatch would cause the VIF to not be UP.
- ✗
The BGP password is incorrect.
Why it's wrong here
An incorrect BGP password would prevent the BGP session from establishing.
- ✗
The on-premises router is not advertising the VPC CIDR via BGP.
Why it's wrong here
The on-premises router should advertise its own CIDR, not the VPC CIDR.
- ✓
The VPC route table does not have a route pointing to the Virtual Private Gateway for the on-premises CIDR.
Why this is correct
Without this route, the VPC does not know to send traffic to the Direct Connect via the VGW.
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Variation 1. A company is using AWS Direct Connect to connect its on-premises data center to AWS. The company wants to ensure that traffic to the VPC uses the Direct Connect connection instead of the internet. Which configuration is required?
easy- A.Create a VPC peering connection to the on-premises network.
- ✓ B.Add a route in the VPC route table pointing to the on-premises CIDR via the virtual private gateway.
- C.Use a NAT gateway in the VPC.
- D.Add a route in the VPC route table pointing to the on-premises CIDR via the internet gateway.
Why B: To ensure traffic uses Direct Connect, the route table in the VPC must have a route to the on-premises CIDR via the virtual private gateway (VGW) attached to the Direct Connect. Additionally, on the on-premises side, routes must point to the Direct Connect. The VPC route table should have a more specific route or a default route pointing to the VGW.
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.