- A
Create a VLAN attachment of type PARTNER on their end and associate it with the customer's VLAN attachment.
The provider creates a corresponding PARTNER VLAN attachment to complete the connection.
- B
Provide the engineer with a pairing key to attach the VLAN attachment to the interconnect.
Why wrong: The pairing key is used by the customer to create the VLAN attachment; the provider does not need it.
- C
Assign a public IP address to the VLAN attachment.
Why wrong: VLAN attachments use private IPs; public IPs are not needed.
- D
Configure BGP routing with the customer's on-premises router.
Why wrong: For Layer 2, BGP is between customer and Google, not with the provider.
Question 491 of 1,000
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 company is using Partner Interconnect with a service provider that offers Layer 2 connectivity. The engineer has created a VLAN attachment of type PARTNER_PROVIDER in Google Cloud. What must the service provider do to complete the connection?
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 of type PARTNER on their end and associate it with the customer's VLAN attachment.
With PARTNER_PROVIDER type, the service provider must attach the VLAN to their network and configure the connection on their side. The provider also needs to set up BGP peering with the customer's on-premises router if using Layer 3, but for Layer 2, BGP is between customer and Google.
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.
- ✓
Create a VLAN attachment of type PARTNER on their end and associate it with the customer's VLAN attachment.
- ✗
Provide the engineer with a pairing key to attach the VLAN attachment to the interconnect.
Why it's wrong here
The pairing key is used by the customer to create the VLAN attachment; the provider does not need it.
- ✗
Assign a public IP address to the VLAN attachment.
- ✗
Configure BGP routing with the customer's on-premises router.
Why it's wrong here
For Layer 2, BGP is between customer and Google, not with the provider.
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.
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Implementing Hybrid Interconnectivity — study guide chapter
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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 of type PARTNER on their end and associate it with the customer's VLAN attachment. — With PARTNER_PROVIDER type, the service provider must attach the VLAN to their network and configure the connection on their side. The provider also needs to set up BGP peering with the customer's on-premises router if using Layer 3, but for Layer 2, BGP is between customer and Google.
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.
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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