This ANS-C01 practice question tests your understanding of network implementation. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. 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 highly available network in AWS. They have two Direct Connect connections from different providers to two different AWS Direct Connect locations. They want to use BGP as the routing protocol. Which TWO actions should be taken to ensure high availability?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Advertise the same on-premises prefixes over both connections with different AS_PATH prepend values
Options A and B are correct because using separate BGP sessions and advertising the same prefixes with different AS_PATH prepending provides path selection and redundancy. Option C is wrong because same community values do not help with path selection. Option D is wrong because only one VIF per connection is needed. Option E is wrong because jumbo frames do not affect availability.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Use the same BGP community values for both connections
Why it's wrong here
Does not affect availability.
✓
Advertise the same on-premises prefixes over both connections with different AS_PATH prepend values
Why this is correct
Allows path selection and failover.
Related concept
Static NAT maps one inside address to one outside address.
✗
Enable jumbo frames on both connections
Why it's wrong here
Jumbo frames improve performance, not availability.
✗
Configure multiple virtual interfaces on a single Direct Connect connection
Why it's wrong here
Single point of failure.
✓
Configure separate BGP sessions for each Direct Connect connection
Why this is correct
Provides independent routing paths.
Related concept
Static NAT maps one inside address to one outside address.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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 the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related ANS-C01 NAT questions on configuration and troubleshooting.
Network Implementation — This question tests Network Implementation — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Advertise the same on-premises prefixes over both connections with different AS_PATH prepend values — Options A and B are correct because using separate BGP sessions and advertising the same prefixes with different AS_PATH prepending provides path selection and redundancy. Option C is wrong because same community values do not help with path selection. Option D is wrong because only one VIF per connection is needed. Option E is wrong because jumbo frames do not affect availability.
What should I do if I get this ANS-C01 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related ANS-C01 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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