hardMultiple ChoiceObjective-mapped
XK0-006 Practice Question: Refer to the exhibit
Network Topology
Refer to the exhibit. A system administrator notices that the SSH service has failed. What is the most likely cause?
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
✓
Another process is already using port 22.
The error message indicates that the address is already in use, meaning another process is already listening on port 22.
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 SSH configuration file has a syntax error.
Why it's wrong here
A syntax error would produce different error messages.
- ✓
Another process is already using port 22.
Why this is correct
The error 'Address already in use' indicates port conflict.
- ✗
The firewall is blocking port 22.
Why it's wrong here
Firewall blocking would not cause 'Address already in use'.
- ✗
The SSH service is not enabled to start on boot.
Why it's wrong here
The service is enabled but failed to start.
Go deeper
Related to this question
Learn chapter
Process Management and System Monitoring
Key term
Process
In IT service management, a process is a structured set of activities designed to accomplish a specific objective, such as managing incidents or changes, by transforming inputs into defined outputs.
Key term
Service
A service is a software component or system that performs a specific function and is available to be used by other programs or users over a network.
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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.