XK0-006 Troubleshooting Practice Question
An administrator is investigating a network issue where a server cannot connect to an external website. They run `ping 8.8.8.8` successfully, but `ping google.com` fails. Which TWO of the following are the most likely causes? (Choose TWO.)
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
✓
The DNS server is unreachable or misconfigured.
Successful ping to IP but failure to hostname indicates DNS resolution problem or incorrect DNS server configuration.
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 network interface is down.
Why it's wrong here
If interface were down, ping to IP would fail.
- ✗
The default gateway is misconfigured.
Why it's wrong here
If gateway were misconfigured, ping to IP would also fail.
- ✓
The DNS server is unreachable or misconfigured.
Why this is correct
DNS resolution fails, so hostname cannot be resolved.
- ✗
The firewall is blocking ICMP traffic.
Why it's wrong here
ICMP to IP succeeded, so firewall is not blocking ICMP.
- ✓
The /etc/hosts file has an incorrect entry for google.com.
Why this is correct
An incorrect hosts entry could resolve to wrong IP or be missing.
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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.