- A
Enables instances without public IPs to access the internet.
Why wrong: While Cloud NAT does allow instances without public IPs to access the internet, this requires a Cloud Router and proper routes; the question tests the nuance that Cloud NAT's benefit is automatic scaling, not just enabling internet access.
- B
Automatically scales with the number of instances.
Cloud NAT automatically scales with the number of instances in a region, eliminating the need to pre-provision or resize NAT gateways.
- C
Allows instances to receive incoming connections from the internet.
Why wrong: Cloud NAT is outbound-only and does not allow incoming connections from the internet.
- D
Provides static external IP for outbound traffic.
Why wrong: Cloud NAT uses ephemeral external IPs by default; static IPs are not a standard benefit and require additional configuration with a Cloud Router.
- E
Integrates with IAP for SSH access.
Why wrong: Cloud NAT does not integrate with IAP for SSH; IAP provides secure access without requiring Cloud NAT.
PCNE Cloud NAT Practice Question
This PCNE practice question tests your understanding of implementing network security. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. A key principle to apply: cloud NAT. 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 of the following are benefits of using Cloud NAT?
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
Automatically scales with the number of instances.
Cloud NAT automatically scales to handle the traffic from all instances in a region, using NAT gateways that are managed by Google, so you do not need to pre-provision or resize the NAT gateway as the number of instances changes.
Key principle: Cloud NAT
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Enables instances without public IPs to access the internet.
- ✓
Automatically scales with the number of instances.
- ✗
Allows instances to receive incoming connections from the internet.
Why it's wrong here
Cloud NAT is outbound-only and does not allow incoming connections from the internet.
- ✗
Provides static external IP for outbound traffic.
- ✗
Integrates with IAP for SSH access.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Candidates often think Cloud NAT directly enables outbound internet access for private instances, but the key trap is that Cloud NAT is just one component; it requires a Cloud Router for route advertisement. The primary tested benefit is its automatic scaling without pre-provisioning.
Detailed technical explanation
How to think about this question
Cloud NAT uses a regional NAT gateway that translates private RFC 1918 addresses to one or more public IP addresses from a NAT IP pool. The gateway automatically scales based on the number of connections and instances, using a connection tracking table that is distributed across multiple Google Front Ends (GFEs). In a real-world scenario, if you have an autoscaling instance group behind a Cloud NAT, the NAT gateway will handle the increased outbound traffic without manual intervention, but you must ensure that the NAT IP pool is large enough to avoid port exhaustion.
KKey Concepts to Remember
- Cloud NAT
- Automatic scaling
- Outbound-only
- Ephemeral IPs
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
Cloud NAT
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
Visual reference
What to study next
Got this wrong? Here's your next step.
Review cloud NAT, then practise related PCNE questions on the same topic to reinforce the concept.
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FAQ
Questions learners often ask
What does this PCNE question test?
Implementing network security — This question tests Implementing network security — Cloud NAT.
What is the correct answer to this question?
The correct answer is: Automatically scales with the number of instances. — Cloud NAT automatically scales to handle the traffic from all instances in a region, using NAT gateways that are managed by Google, so you do not need to pre-provision or resize the NAT gateway as the number of instances changes.
What should I do if I get this PCNE question wrong?
Review cloud NAT, then practise related PCNE questions on the same topic to reinforce the concept.
What is the key concept behind this question?
Cloud NAT
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Last reviewed: Jun 30, 2026
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.
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