PCNE Configuring Network Services Practice Question
A company uses Traffic Director with Envoy sidecars for service mesh. They want to gradually shift traffic from version 1 to version 2 of a service, starting with 10% traffic to version 2. Which Traffic Director feature should they use?
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
✓
Traffic splitting
Traffic Director supports traffic splitting via the service routing API (TrafficDirectorService). You can define weighted destinations in the routing rule to split traffic between 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.
- ✓
Traffic splitting
Why this is correct
Traffic splitting allows you to assign weights to different backends for gradual rollout.
- ✗
Circuit breakers
Why it's wrong here
Circuit breakers protect services from cascading failures, not for traffic splitting.
- ✗
Fault injection
Why it's wrong here
Fault injection is for testing resilience, not traffic shifting.
- ✗
mTLS authentication
Why it's wrong here
mTLS is for securing inter-service communication, not traffic routing.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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