PCNE Configuring Network Services Practice Question
A company wants to serve private content from Cloud CDN using signed URLs that expire after 1 hour. Which steps are required to enable this?
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
✓
Create a signing key in Cloud CDN, then generate signed URLs with expiration using that key.
Signed URLs require a signing key (created via Cloud CDN backend bucket configuration) and generating URLs programmatically with expiration. Enabling IAP is not required. The key is not passed in the header but as query parameters. Just setting cache mode does not enable signed URLs.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Set the cache mode to FORCE_CACHE_ALL and enable private access.
Why it's wrong here
Cache mode alone does not enforce access control; signed URLs are needed.
- ✗
Pass the signing key in the X-Goog-Signed-URL header on each request.
Why it's wrong here
The signing key is not passed in headers; the signature is passed as query parameters.
- ✓
Create a signing key in Cloud CDN, then generate signed URLs with expiration using that key.
Why this is correct
Correct: signing keys are created in Cloud CDN, and signed URLs are generated client-side with the key.
- ✗
Enable IAP on the backend and generate signed URLs using the IAP client ID.
Why it's wrong here
IAP uses signed headers (JWTs), not URL signing. Signed URLs are a Cloud CDN feature.
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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.