PCNE Configuring Network Services Practice Question
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.
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.
- ✗
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.
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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.