PCNE Configuring Network Services Practice Question
An engineer wants to use Traffic Director to split traffic between two versions of a microservice running on Compute Engine with Envoy sidecars. They want to send 10% of traffic to the new version. Which configuration should they apply?
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 weighted backend service with versionA weight 90 and versionB weight 10
Traffic Director uses traffic splitting rules with weight percentages. The backend service or routing rule allows assigning weights to different versions.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Create a weighted backend service with versionA weight 90 and versionB weight 10
Why this is correct
Correct. Traffic Director supports weighted routing.
- ✗
Use HTTP load balancer URL map to route 10% of requests
Why it's wrong here
URL map is for URL-based routing, not traffic splitting by percentage.
- ✗
Configure a firewall rule to drop 10% of traffic to versionA
Why it's wrong here
Firewall rules do not perform traffic splitting.
- ✗
Deploy versionB in a different region and use geo-routing
Why it's wrong here
Geo-routing routes based on location, not percentages.
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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.