EX280 Networking And Network Policies Practice Question
Which THREE conditions must be met for a NetworkPolicy to successfully allow traffic from another pod? (Choose THREE)
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
✓
If an ingress policy is present, the connection must be explicitly permitted by at least one rule.
Traffic must not be blocked by default namespace isolation, the source must match the ingress rule selector, and the port/protocol must match.
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 cluster must have exactly three worker nodes.
Why it's wrong here
Network policies function independently of node count.
- ✗
The physical switch port on the top-of-rack switch must be configured in trunk mode.
Why it's wrong here
Underlay physical switch configurations are managed by infrastructure teams, not Kubernetes NetworkPolicies.
- ✓
If an ingress policy is present, the connection must be explicitly permitted by at least one rule.
Why this is correct
If a namespace has a restrictive network policy, all traffic is denied unless matched by an ingress rule.
- ✓
The target port and protocol specified in the NetworkPolicy must match the traffic.
Why this is correct
Port definitions in network policies restrict traffic to specific ports.
- ✓
The source pod must match the podSelector or namespaceSelector specified in the ingress rule.
Why this is correct
Ingress rules require explicit selector matching.
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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 Red Hat exam blueprint
This EX280 practice question is part of Courseiva's free Red Hat 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 EX280 exam.