XK0-006 Troubleshooting Practice Question
A user reports that they cannot access a web server at 192.168.1.100. The administrator wants to check if the server is reachable and measure round-trip time. Which command is most appropriate?
⚠ Common exam trap
It's easy for candidates to confuse `nmap -sn` (host discovery) with connectivity testing and RTT measurement, or they think `traceroute` measures end-to-end RTT when it actually measures per-hop latency.
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
✓
ping 192.168.1.100
The `ping` command sends ICMP Echo Request packets to the target host and waits for ICMP Echo Reply packets, which directly tests reachability and measures round-trip time (RTT). This is the most appropriate tool for the administrator's stated goal of checking if the server is reachable and measuring RTT.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
nmap -sn 192.168.1.100
Why it's wrong here
nmap -sn does a ping scan but is not the standard tool for simple reachability.
- ✗
traceroute 192.168.1.100
Why it's wrong here
traceroute shows the path, not just reachability.
- ✓
ping 192.168.1.100
Why this is correct
ping tests connectivity and shows RTT.
- ✗
ss -tlnp | grep 192.168.1.100
Why it's wrong here
ss shows local socket stats, not remote reachability.
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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.