PCNE Practice Question: Designing, planning, and prototyping a GCP network
This PCNE practice question tests your understanding of designing, planning, and prototyping a gcp network. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
Which TWO statements are true about VPC Network Peering?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Each VPC can have up to 25 peerings by default
Option A is correct because the default limit for VPC Network Peering per VPC is 25, as documented in Google Cloud's quotas and limits. This is a soft limit that can be increased by requesting a quota adjustment, but by default, each VPC can have up to 25 peerings. Option B is correct because VPC Network Peering allows direct communication between VPCs using RFC 1918 private IP addresses without requiring VPN tunnels or Cloud Interconnect, as the peering connection uses Google's internal network infrastructure.
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.
✓
Each VPC can have up to 25 peerings by default
Why this is correct
Default limit is 25 peerings per VPC.
Related concept
Read the scenario before looking for a memorised answer.
✓
Peered VPCs can communicate using RFC 1918 IP addresses without the need for VPN or Interconnect
Why this is correct
VPC peering enables private IP communication directly.
Related concept
Read the scenario before looking for a memorised answer.
✗
Firewall rules in one VPC are automatically applied to the peered VPC
Why it's wrong here
Firewall rules are per VPC; peered VPCs have separate rule sets.
✗
VPC peering incurs additional cost beyond standard egress charges
Why it's wrong here
No additional cost for peering itself.
✗
Custom static routes are automatically exchanged between peered VPCs
Why it's wrong here
Custom routes must be exported/imported explicitly.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume firewall rules or custom routes are automatically shared across peered VPCs, but Google Cloud explicitly requires separate firewall rule management and manual route exchange configuration for custom routes.
Detailed technical explanation
How to think about this question
Under the hood, VPC Network Peering uses Google's internal backbone to route traffic between VPCs, leveraging BGP-like route exchange for subnet routes only. A key subtle behavior is that if you need to exchange custom static routes (e.g., for on-premises connectivity via VPN), you must enable the 'Export custom routes' and 'Import custom routes' options during peering setup, which is not automatic. In a real-world scenario, if you have a centralized inspection VPC with a firewall appliance, you must manually configure firewall rules in the inspection VPC to allow traffic from peered VPCs, as no rules are inherited.
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 startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
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.
Designing, planning, and prototyping a GCP network — This question tests Designing, planning, and prototyping a GCP network — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Each VPC can have up to 25 peerings by default — Option A is correct because the default limit for VPC Network Peering per VPC is 25, as documented in Google Cloud's quotas and limits. This is a soft limit that can be increased by requesting a quota adjustment, but by default, each VPC can have up to 25 peerings. Option B is correct because VPC Network Peering allows direct communication between VPCs using RFC 1918 private IP addresses without requiring VPN tunnels or Cloud Interconnect, as the peering connection uses Google's internal network infrastructure.
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.
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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
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