ICA Securing Workloads Practice Question
You want to implement a 'Deny-All' strategy for your mesh and explicitly whitelist only necessary traffic. What is the correct order to achieve 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 an AuthorizationPolicy with action 'DENY' and no rules, then add ALLOW policies.
Apply a global AuthorizationPolicy with action 'DENY' and selector 'matchLabels: {}', then apply granular 'ALLOW' policies for specific services.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Modify the Istio mesh configuration to default to DENY.
Why it's wrong here
This is not a direct configuration option in MeshConfig.
- ✗
Use NetworkPolicies instead of AuthorizationPolicies.
Why it's wrong here
NetworkPolicies are Layer 4; AuthorizationPolicies provide Layer 7 security which is better for mesh.
- ✓
Create an AuthorizationPolicy with action 'DENY' and no rules, then add ALLOW policies.
Why this is correct
An empty DENY policy denies everything, then specific ALLOW policies override or permit necessary paths.
- ✗
Use PeerAuthentication to block all traffic.
Why it's wrong here
PeerAuthentication handles mTLS, not access control.
About these practice questions
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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.