- A
Configure BGP ASN prepending to influence path selection
Helps control traffic flow.
- B
Use different Direct Connect providers in each region
Provider diversity reduces risk.
- C
Use different Direct Connect locations within each region
Location diversity improves availability.
- D
Use multiple virtual interfaces per Direct Connect connection
Why wrong: Not necessary for availability.
- E
Use the same BGP ASN for all Direct Connect connections
Why wrong: Same ASN can cause routing issues.
Question 205 of 1,705
Direct Connect High Availability: Multi-Region Design with BGP Prepending
This ANS-C01 practice question tests your understanding of network management and operations. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. A key principle to apply: direct Connect. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
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.
Key principle: Direct Connect
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.
Related concept
Direct Connect
- ✓
Use different Direct Connect providers in each region
Why this is correct
Provider diversity reduces risk.
Related concept
Direct Connect
- ✓
Use different Direct Connect locations within each region
Why this is correct
Location diversity improves availability.
Related concept
Direct Connect
- ✗
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.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
Treat this as a scenario question. Identify the problem, the constraint, and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- Direct Connect
- BGP ASN prepending
- Physical diversity
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Direct Connect
Real-world example
How this comes up in practice
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
What to study next
Got this wrong? Here's your next step.
Review direct Connect, then practise related ANS-C01 questions on the same topic to reinforce the concept.
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FAQ
Questions learners often ask
What does this ANS-C01 question test?
Network Management and Operations — This question tests Network Management and Operations — Direct Connect.
What is the correct answer to this question?
The correct answer is: 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.
What should I do if I get this ANS-C01 question wrong?
Review direct Connect, then practise related ANS-C01 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
Direct Connect
About these practice questions
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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: Option B is correct because 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: Option A is correct because 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.
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Last reviewed: Jun 20, 2026
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