- A
Increase the eBGP multihop TTL to 2.
Why wrong: eBGP multihop is not needed for directly connected routers.
- B
Configure the BGP peer with a public ASN on the customer side.
Why wrong: Public ASN is not required; Direct Connect uses private ASNs.
- C
Enable BGP authentication with MD5 password.
Why wrong: MD5 authentication is optional, not required for peering.
- D
Change the customer ASN to a value in the 64512-65534 range.
Direct Connect requires private ASNs for the customer side.
Question 1,361 of 1,705
Why Your BGP ASN Must Be in the Private Range 64512-65534 for Direct Connect
This ANS-C01 practice question tests your understanding of network implementation. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 setting up a Direct Connect connection to AWS. The on-premises router is configured with a BGP ASN of 65000. The AWS side uses a public ASN of 64512. Which configuration change is required for BGP peering to establish?
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
✓
Change the customer ASN to a value in the 64512-65534 range.
The customer's BGP ASN 65000 is not within the private ASN range 64512-65534 required by AWS Direct Connect. Therefore, the customer must change their ASN to a value in that range to establish BGP peering.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Increase the eBGP multihop TTL to 2.
Why it's wrong here
eBGP multihop is not needed for directly connected routers.
- ✗
Configure the BGP peer with a public ASN on the customer side.
Why it's wrong here
Public ASN is not required; Direct Connect uses private ASNs.
- ✗
Enable BGP authentication with MD5 password.
Why it's wrong here
MD5 authentication is optional, not required for peering.
- ✓
Change the customer ASN to a value in the 64512-65534 range.
Why this is correct
Direct Connect requires private ASNs for the customer side.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume any ASN is acceptable for BGP peering, but AWS Direct Connect specifically requires the customer ASN to be in the private range 64512–65534 unless a special request is made to use a public ASN.
Detailed technical explanation
How to think about this question
AWS Direct Connect uses eBGP for route exchange, and the customer’s BGP ASN must be a private ASN (64512–65534) unless the customer owns a public ASN and explicitly requests its use. The AWS side uses ASN 64512 (a public ASN in the global range, but treated as private for Direct Connect). If the customer uses a public ASN like 65000, AWS will reject the BGP session because it expects a private ASN by default. This is enforced at the BGP OPEN message stage, where the ASN field is validated.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
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
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
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FAQ
Questions learners often ask
What does this ANS-C01 question test?
Network Implementation — This question tests Network Implementation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Change the customer ASN to a value in the 64512-65534 range. — The customer's BGP ASN 65000 is not within the private ASN range 64512-65534 required by AWS Direct Connect. Therefore, the customer must change their ASN to a value in that range to establish BGP peering.
What should I do if I get this ANS-C01 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
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