ICA Securing Workloads Practice Question
When using JWT authentication, where does the Istio sidecar fetch the public key (JWKS) required for token verification?
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
✓
The sidecar fetches it directly from the URL specified in the 'jwksUri' field of the RequestAuthentication resource.
The sidecar automatically fetches the JWKS from the URL defined in the 'jwksUri' field within the RequestAuthentication policy.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The sidecar fetches it directly from the URL specified in the 'jwksUri' field of the RequestAuthentication resource.
Why this is correct
The sidecar directly queries the JWKS endpoint.
- ✗
It is hardcoded in the Envoy binary.
Why it's wrong here
Keys are dynamic and fetched at runtime.
- ✗
The Istio Control Plane (istiod) fetches it and pushes it to the sidecar.
Why it's wrong here
The sidecar performs the fetch directly using the URI provided in the policy.
- ✗
The user must manually upload the public key as a Kubernetes Secret.
Why it's wrong here
This is not required if the 'jwksUri' is provided.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official CNCF / Linux Foundation exam blueprint
This ICA practice question is part of Courseiva's free CNCF / Linux Foundation 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 ICA exam.