PCNE Implementing hybrid interconnectivity Practice Question
This PCNE practice question tests your understanding of implementing hybrid interconnectivity. 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 uses a shared VPC with multiple service projects. They want to connect their on-premises data center to the shared VPC through a Dedicated Interconnect. Where should they configure the Cloud Router and VLAN attachment?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
In the host project of the shared VPC
In a shared VPC architecture, the Cloud Router and VLAN attachment for Dedicated Interconnect must be configured in the host project because the host project owns the VPC network and manages all network resources, including interconnect attachments. Service projects consume subnets from the host project but cannot create or manage interconnect resources. This ensures that the on-premises connectivity is centrally managed and that all service projects can use the interconnect through the shared VPC's routing.
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.
✗
In the same region as the majority of service project instances
Why it's wrong here
Interconnect attachments are regional but created in host project.
✓
In the host project of the shared VPC
Why this is correct
Host project manages networking for all service projects.
Related concept
Read the scenario before looking for a memorised answer.
✗
In a global resource policy, cross-project
Why it's wrong here
No global resource for Interconnect.
✗
In the service project that will use the connectivity
Why it's wrong here
Service projects can use but not host Interconnect resources typically.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Google Cloud often tests the misconception that interconnect resources can be configured in a service project because the service project uses the VPC, but in reality, the host project owns the VPC and all network-level resources like Cloud Routers and VLAN attachments must be created there.
Detailed technical explanation
How to think about this question
The VLAN attachment (interconnectAttachment) is a regional resource that binds to a specific Cloud Router in the same region, and the Cloud Router manages BGP sessions (eBGP with ASN 16550 for Google) to exchange routes with the on-premises router. In a shared VPC, the host project's VPC network is the only network that can have a Cloud Router, and all service projects' subnets are attached to that network, so the interconnect must be configured in the host project to propagate routes to all service projects via the VPC's dynamic routing. A common real-world scenario is when an organization has multiple service projects needing low-latency access to on-premises resources; configuring the interconnect in the host project ensures a single point of management and consistent route advertisement.
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.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Implementing hybrid interconnectivity — This question tests Implementing hybrid interconnectivity — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: In the host project of the shared VPC — In a shared VPC architecture, the Cloud Router and VLAN attachment for Dedicated Interconnect must be configured in the host project because the host project owns the VPC network and manages all network resources, including interconnect attachments. Service projects consume subnets from the host project but cannot create or manage interconnect resources. This ensures that the on-premises connectivity is centrally managed and that all service projects can use the interconnect through the shared VPC's routing.
What should I do if I get this PCNE 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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.