- A
Configure a VPN tunnel for backup connectivity.
Why wrong: VPN is for backup or separate connectivity, not the first step for Dedicated Interconnect.
- B
Create a VLAN attachment to associate with the interconnect.
A VLAN attachment is the first logical configuration step after the physical connection.
- C
Enable Cloud NAT for outbound traffic.
Why wrong: Cloud NAT is unrelated to interconnect setup.
- D
Create a Cloud Router with BGP sessions.
Why wrong: Cloud Router is needed later to exchange routes, but the first step is creating the VLAN attachment.
Question 752 of 982
PCNE Implementing Hybrid Interconnectivity Practice Question
This PCNE practice question tests your understanding of implementing hybrid interconnectivity. 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 network engineer is setting up a Dedicated Interconnect between an on-premises network and Google Cloud. After the circuit is ordered and the physical connection is established at the co-location facility, what is the first step to configure the interconnect inside GCP?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"first"Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
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
✓
Create a VLAN attachment to associate with the interconnect.
After the physical connection is ready, you must create a VLAN attachment in Google Cloud to define the connection between your VPC and the interconnect.
Key principle: A trunk being up does not mean the VLAN is allowed across it. Always verify the allowed VLAN list and whether the VLAN exists on both switches.
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 a VPN tunnel for backup connectivity.
Why it's wrong here
VPN is for backup or separate connectivity, not the first step for Dedicated Interconnect.
- ✓
Create a VLAN attachment to associate with the interconnect.
- ✗
Enable Cloud NAT for outbound traffic.
Why it's wrong here
Cloud NAT is unrelated to interconnect setup.
- ✗
Create a Cloud Router with BGP sessions.
Why it's wrong here
Cloud Router is needed later to exchange routes, but the first step is creating the VLAN attachment.
Common exam traps
Common exam trap: an active trunk can still block the VLAN you need
A trunk being up does not prove every VLAN is crossing it. Check allowed VLAN lists, native VLAN mismatch, VLAN existence and access-port assignment.
Detailed technical explanation
How to think about this question
VLAN questions usually combine access-port and trunking clues. The key is to identify whether the issue is local to one switchport, caused by the trunk, or caused by the VLAN not existing where it needs to exist.
KKey Concepts to Remember
- Access ports place end devices into a single VLAN.
- Trunk ports carry multiple VLANs between switches.
- Allowed VLAN lists decide which VLANs can cross a trunk.
- Native VLAN mismatch can create confusing symptoms.
TExam Day Tips
- Use show vlan brief to verify access VLANs.
- Use show interfaces trunk to verify trunk state and allowed VLANs.
- Do not treat every same-VLAN issue as a routing problem.
Key takeaway
A trunk being up does not mean the VLAN is allowed across it. Always verify the allowed VLAN list and whether the VLAN exists on both switches.
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.
Visual reference
What to study next
Got this wrong? Here's your next step.
Review VLAN allowed lists, native VLAN mismatch detection, and how to verify VLAN membership with show vlan brief and show interfaces trunk. Then practise related PCNE questions on switching, trunking, and access-port configuration.
- →
Implementing Hybrid Interconnectivity — study guide chapter
Learn the concepts, then practise the questions
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Implementing Hybrid Interconnectivity practice questions
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FAQ
Questions learners often ask
What does this PCNE question test?
Implementing Hybrid Interconnectivity — This question tests Implementing Hybrid Interconnectivity — Access ports place end devices into a single VLAN..
What is the correct answer to this question?
The correct answer is: Create a VLAN attachment to associate with the interconnect. — After the physical connection is ready, you must create a VLAN attachment in Google Cloud to define the connection between your VPC and the interconnect.
What should I do if I get this PCNE question wrong?
Review VLAN allowed lists, native VLAN mismatch detection, and how to verify VLAN membership with show vlan brief and show interfaces trunk. Then practise related PCNE questions on switching, trunking, and access-port configuration.
Are there clue words in this question I should notice?
Yes — watch for: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
What is the key concept behind this question?
Access ports place end devices into a single VLAN.
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Last reviewed: Jul 4, 2026
This PCNE practice question is part of Courseiva's free Google Cloud 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 PCNE exam.
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