ANS-C01 Direct Connect Practice Question
A company is designing a multi-region network with Direct Connect. They have two Direct Connect connections in each region. They want to achieve the HIGHEST availability and lowest latency for cross-region traffic. Which THREE design elements should they include?
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
✓
Configure BGP ASN prepending to influence path selection
Options A, B, and C are correct. Using different Direct Connect providers in each region avoids a single point of failure and enhances availability. Using different Direct Connect locations within each region provides physical diversity, further increasing resilience. ASN prepending allows you to influence BGP path selection, enabling you to choose lower-latency paths for cross-region traffic. Option D is incorrect because multiple virtual interfaces per connection are not necessary for the highest availability; they would still share the same underlying physical connection. Option E is incorrect because using the same BGP ASN for all connections can cause routing issues and does not improve availability or latency.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Configure BGP ASN prepending to influence path selection
Why this is correct
Helps control traffic flow.
- ✓
Use different Direct Connect providers in each region
Why this is correct
Provider diversity reduces risk.
- ✓
Use different Direct Connect locations within each region
Why this is correct
Location diversity improves availability.
- ✗
Use multiple virtual interfaces per Direct Connect connection
Why it's wrong here
Not necessary for availability.
- ✗
Use the same BGP ASN for all Direct Connect connections
Why it's wrong here
Same ASN can cause routing issues.
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Same concept, more angles
2 more ways this is tested on ANS-C01
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A company uses AWS Direct Connect with a private virtual interface (VIF) to connect its data center to a VPC. The network team needs to ensure high availability and failover in case the primary connection fails. Which solution provides the most cost-effective high availability?
medium- A.Use a VPN connection over the internet as a backup
- ✓ B.Provision a second Direct Connect connection at a different AWS Direct Connect location and configure BGP with AS_PATH prepending
- C.Use a VPN connection over the same Direct Connect connection as backup
- D.Provision a second private virtual interface on the same Direct Connect connection
Why B: Provisioning a second Direct Connect connection at a different AWS Direct Connect location provides geographic redundancy, and configuring BGP with AS_PATH prepending on the secondary connection ensures the primary connection is preferred under normal conditions. This offers high availability without relying on internet-based VPN, which, while cheaper, introduces variability and lower reliability. Option A (VPN over internet) is less costly but does not guarantee the same level of performance or reliability for hybrid networking. Option C (VPN over same Direct Connect) fails because it shares the same physical connection, creating a single point of failure. Option D (second private VIF on same connection) also shares the same physical infrastructure, so it does not provide true redundancy.
Variation 2. A company uses AWS Direct Connect with multiple virtual interfaces (VIFs) to connect to multiple VPCs. The network team wants to ensure high availability and failover. Which configuration provides the best resiliency?
hard- ✓ A.Provision two Direct Connect connections from different providers and configure BGP
- B.Use a single Direct Connect connection with a VPN backup over the internet
- C.Configure BGP with multiple AS paths on the same Direct Connect connection
- D.Create multiple private VIFs on a single Direct Connect connection
Why A: Using two separate Direct Connect connections from different providers provides path diversity and eliminates single points of failure. If one connection fails, BGP will route traffic through the other connection. Option B is wrong because a single Direct Connect connection with a VPN backup still shares the same physical infrastructure and the internet backup may not provide the same SLA. Option C is wrong because multiple AS paths on the same connection do not provide physical redundancy; they only affect route selection. Option D is wrong because multiple private VIFs on a single connection still depend on that single physical link.
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.