PCNE Practice Question: Managing, Monitoring, and Optimising Network Operations
A network engineer wants to test reachability between a Compute Engine instance in VPC A and a Cloud SQL instance in VPC B, which are connected via VPC peering. Which Google Cloud tool should be used to check if firewall rules or routes are blocking traffic?
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
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Connectivity Tests
Connectivity Tests in Network Intelligence Center allows you to define source and destination and checks configurations like firewall rules, routes, and VPC peering to determine if traffic can flow.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
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Connectivity Tests
Why this is correct
Correct: Connectivity Tests analyze the path between source and destination, considering firewall rules, routes, and peering.
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Packet Mirroring
Why it's wrong here
Packet Mirroring sends traffic copies to monitoring tools, not for testing reachability.
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VPC Flow Logs
Why it's wrong here
VPC Flow Logs capture network flows but do not proactively test reachability.
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Firewall Insights
Why it's wrong here
Firewall Insights provide analytics on firewall rules but not end-to-end reachability testing.
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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.