PCNE Implementing VPC Instances Practice Question
A company wants to provide outbound internet access to Compute Engine instances without external IPs, while minimizing IP address consumption. Which Cloud NAT feature should be used to achieve minimal static IP usage?
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
✓
Dynamic port allocation
Cloud NAT supports dynamic port allocation, which uses ephemeral IP addresses from the NAT IP pool. Static port allocation reserves ports per VM and may require more IPs. The question asks to minimize IP consumption, so using dynamic allocation with a small number of NAT IPs is optimal.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Dynamic port allocation
Why this is correct
Correct. Dynamic allocation shares ports from a pool, minimizing the number of NAT IPs needed.
- ✗
Using a single NAT IP for all VMs
Why it's wrong here
That's possible but not a feature name; dynamic allocation is the mechanism.
- ✗
Enabling Cloud NAT logging
Why it's wrong here
Logging does not affect IP consumption.
- ✗
Static port allocation
Why it's wrong here
Static allocation reserves ports for each VM, likely requiring more IPs.
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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.