PCNE Practice Question: Managing, Monitoring, and Optimising Network Operations
A company uses Cloud NAT for outbound internet access from private instances. They want to monitor for connection failures due to NAT resource exhaustion. Which two steps should they take? (Choose two.)
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
✓
Enable Cloud NAT logging
Enable Cloud NAT logging to capture connection and allocation failures. Set up alerts on NAT logs to detect failures. VPC Flow Logs do not capture NAT-specific failures. Firewall Insights are for firewall rules. Packet Mirroring is not relevant.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Enable Cloud NAT logging
Why this is correct
Correct: NAT logs record connection and allocation failures.
- ✗
Enable VPC Flow Logs on the subnet
Why it's wrong here
Flow Logs show network flows but not NAT allocation failures.
- ✗
Use Packet Mirroring to capture NAT traffic
Why it's wrong here
Packet Mirroring copies traffic but not NAT-specific logs.
- ✗
Use Firewall Insights to check for blocked traffic
Why it's wrong here
Firewall Insights are for firewall rules, not NAT.
- ✓
Set up log-based metrics and alerts on NAT logs
Why this is correct
Correct: Alerts on NAT logs can notify administrators of failures.
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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.