- A
A Direct Connect Gateway to connect to the VPC.
Why wrong: A private VIF can connect directly to a single VPC without a Direct Connect Gateway.
- B
A VLAN ID for the virtual interface.
VLAN ID is required to tag traffic.
- C
A public IP address for the AWS side of the BGP session.
Why wrong: Private VIF uses private IP addresses.
- D
A BGP session with the AWS Direct Connect endpoint using public IPs.
Why wrong: Private VIF uses private IPs for BGP.
- E
A BGP session to exchange routing information.
BGP is used to advertise routes.
Question 831 of 1,705
ANS-C01 Network Implementation Practice Question
This ANS-C01 practice question tests your understanding of network implementation. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 hybrid network using AWS Direct Connect. Which TWO of the following are required to establish a private virtual interface (VIF) to a single VPC?
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
✓
A VLAN ID for the virtual interface.
A VLAN ID is required to create a private virtual interface (VIF) because it uniquely identifies the 802.1Q VLAN tag used to segregate traffic on the Direct Connect link. Without a VLAN ID, the physical connection cannot logically separate the private VIF from other virtual interfaces (e.g., public or transit VIFs) on the same circuit.
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.
- ✗
A Direct Connect Gateway to connect to the VPC.
Why it's wrong here
A private VIF can connect directly to a single VPC without a Direct Connect Gateway.
- ✓
A VLAN ID for the virtual interface.
Why this is correct
VLAN ID is required to tag traffic.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
A public IP address for the AWS side of the BGP session.
Why it's wrong here
Private VIF uses private IP addresses.
- ✗
A BGP session with the AWS Direct Connect endpoint using public IPs.
- ✓
A BGP session to exchange routing information.
Why this is correct
BGP is used to advertise routes.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The ANS-C01 exam often tests the misconception that a Direct Connect Gateway is mandatory for any private VIF, but it is only required when connecting to multiple VPCs or using a transit VIF, not for a single VPC connection.
Detailed technical explanation
How to think about this question
The VLAN ID (802.1Q tag) must be unique per virtual interface on the same Direct Connect connection and is negotiated during the LOA-CFA process. The BGP session for a private VIF uses link-local addresses (169.254.x.x/30 or /31) and exchanges routes for the VPC CIDR and on-premises prefixes, with the customer router advertising a single prefix (or more with BGP communities) and AWS advertising the VPC CIDR.
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 healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
Visual reference
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: A VLAN ID for the virtual interface. — A VLAN ID is required to create a private virtual interface (VIF) because it uniquely identifies the 802.1Q VLAN tag used to segregate traffic on the Direct Connect link. Without a VLAN ID, the physical connection cannot logically separate the private VIF from other virtual interfaces (e.g., public or transit VIFs) on the same circuit.
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
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.
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