ICA Securing Workloads Practice Question
What is the default behavior of Istio when no AuthorizationPolicy is present for a workload?
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
✓
Allow all traffic.
By default, Istio allows all traffic (PERMISSIVE/ALLOW ALL) unless an explicit policy is defined.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Allow only traffic within the same namespace.
Why it's wrong here
Istio does not restrict by namespace by default.
- ✗
Deny all traffic.
Why it's wrong here
Istio defaults to 'allow-all' to ensure zero-breakage on installation.
- ✗
Require mTLS for all traffic.
Why it's wrong here
PeerAuthentication default is PERMISSIVE, not STRICT.
- ✓
Allow all traffic.
Why this is correct
Without policies, Istio does not restrict access.
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.