- A
Enable CDN on the backend service that serves /images/*
Create a separate backend service for images with CDN enabled, and route /images/* to it via URL map.
- B
Use the gcloud compute url-maps add-path-matcher command with --cache-mode
Why wrong: URL map path matchers do not have a cache mode; cache mode is set on the backend.
- C
Set a cache key header for /images/* in the URL map
Why wrong: Cache keys control caching behavior but do not enable CDN; CDN must be enabled on the backend.
- D
Enable Cloud CDN at the load balancer level
Why wrong: Cloud CDN is enabled per backend, not at the load balancer level.
Question 469 of 1,000
PCNE Configuring Network Services Practice Question
This PCNE practice question tests your understanding of configuring network services. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
An engineer manages a global application using Global external HTTP(S) Load Balancer with URL map routing to multiple backend services. They want to enable Cloud CDN for the /images/* path. What is the correct way to enable CDN for that specific path?
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 CDN on the backend service that serves /images/*
To enable CDN for a specific path, you must create a backend bucket (or backend service with CDN enabled) and configure a URL map rule that routes the path /images/* to that backend. Enabling CDN on the backend service itself will apply to all paths served by that backend.
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.
- ✓
Enable CDN on the backend service that serves /images/*
Why this is correct
Create a separate backend service for images with CDN enabled, and route /images/* to it via URL map.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use the gcloud compute url-maps add-path-matcher command with --cache-mode
Why it's wrong here
URL map path matchers do not have a cache mode; cache mode is set on the backend.
- ✗
Set a cache key header for /images/* in the URL map
Why it's wrong here
Cache keys control caching behavior but do not enable CDN; CDN must be enabled on the backend.
- ✗
Enable Cloud CDN at the load balancer level
Why it's wrong here
Cloud CDN is enabled per backend, not at the load balancer level.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- 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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Identify which PCNE exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
- →
Configuring Network Services — study guide chapter
Learn the concepts, then practise the questions
- →
Configuring Network Services practice questions
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Google Professional Cloud Network Engineer study guide
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FAQ
Questions learners often ask
What does this PCNE question test?
Configuring Network Services — This question tests Configuring Network Services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable CDN on the backend service that serves /images/* — To enable CDN for a specific path, you must create a backend bucket (or backend service with CDN enabled) and configure a URL map rule that routes the path /images/* to that backend. Enabling CDN on the backend service itself will apply to all paths served by that backend.
What should I do if I get this PCNE question wrong?
Identify which PCNE exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jul 4, 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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