PCNE Configuring Network Services Practice Question
A large enterprise is migrating to Google Cloud and needs to establish connectivity between on-premises and VPCs in two different regions (us-east1 and europe-west1). They have a single Partner Interconnect connection at a co-location facility in New York. They want to use the same interconnect for both regions. Which configuration should they use?
⚠ Common exam trap
Google Cloud often tests the misconception that a single VLAN attachment can serve multiple regions, but in Google Cloud, VLAN attachments are regional resources and cannot be shared across regions.
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 two VLAN attachments, one for each region, over the same interconnect
A is correct because a single Partner Interconnect connection can support multiple VLAN attachments, each associated with a different region. By creating two VLAN attachments over the same interconnect—one for us-east1 and one for europe-west1—the enterprise can route traffic from the on-premises network to both VPCs using the same physical link, leveraging Google Cloud's support for multiple VLAN attachments per interconnect.
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 two VLAN attachments, one for each region, over the same interconnect
Why this is correct
VLAN attachments are regional; multiple can share same interconnect.
- ✗
Create one VLAN attachment and attach it to both VPCs
Why it's wrong here
A VLAN attachment can only be attached to one VPC.
- ✗
Use HA VPN over the interconnect to connect both regions
Why it's wrong here
HA VPN is for Cloud VPN, not using the interconnect directly.
- ✗
Create two Cloud VPN tunnels from on-prem to each VPC
Why it's wrong here
Does not use the interconnect; unnecessary overhead.
Visual reference
Go deeper
Related to this question
About these practice questions
Courseiva writes every PCNE question from scratch — 961 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.