XK0-006 Troubleshooting Practice Question
A server running RHEL 8 has intermittent network connectivity. The administrator wants to view the current DNS resolver configuration. Which file should be examined?
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
✓
/etc/resolv.conf
/etc/resolv.conf contains nameserver entries. /etc/nsswitch.conf defines order, /etc/hosts for static mapping, and /etc/sysconfig/network-scripts/ifcfg-* for interface config.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
/etc/sysconfig/network-scripts/ifcfg-eth0
Why it's wrong here
Interface configuration may include DNS but not the runtime resolver config.
- ✗
/etc/nsswitch.conf
Why it's wrong here
Defines name service switch order, not DNS servers.
- ✓
/etc/resolv.conf
Why this is correct
Contains nameserver IP addresses.
- ✗
/etc/hosts
Why it's wrong here
Static IP-hostname mappings, not DNS servers.
Visual reference
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Related to this question
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File Permissions and Ownership
Key term
DNS
DNS is the system that translates human-friendly domain names like example.com into machine-readable IP addresses so computers can find each other on a network.
Key term
nsswitch
nsswitch (Name Service Switch) is a configuration file in Unix-like operating systems that determines which databases and services are consulted to resolve system information like user names, group memberships, and hostnames.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This XK0-006 practice question is part of Courseiva's free CompTIA 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 XK0-006 exam.