EX280 Networking And Network Policies Practice Question
Which THREE parameters can be configured within the cluster DNS operator resource (dns.operator/default)? (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
✓
Upstream DNS forwarders
The DNS operator allows configuring forwarders, client IP handling, and server blocks/zones.
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 physical MTU size of the cluster worker node network interfaces
Why it's wrong here
MTU is configured in the Network operator, not DNS.
- ✓
Upstream DNS forwarders
Why this is correct
Administrators can configure forward plugins to external DNS servers.
- ✓
Custom upstream server zones and bindings
Why this is correct
Additional server zones can be defined for custom domains.
- ✓
Handler logs and log levels for CoreDNS
Why this is correct
CoreDNS logging can be tuned via the DNS operator.
- ✗
The default HAProxy router replica count
Why it's wrong here
Router replicas are configured via the IngressController resource.
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 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.