hardMultiple ChoiceObjective-mapped
XK0-006 Practice Question: Refer to the exhibit
Exhibit
systemctl status sshd
● sshd.service - OpenSSH server daemon
Loaded: loaded (/usr/lib/systemd/system/sshd.service; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Mon 2023-03-13 09:15:23 UTC; 2min 47s ago
Docs: man:sshd(8)
man:sshd_config(5)
Process: 1234 ExecStart=/usr/sbin/sshd -D $OPTIONS (code=exited, status=255)
Main PID: 1234 (code=exited, status=255)
Status: "Failed to start sshd: Address already in use"Refer to the exhibit. A system administrator checks the status of the SSH service and sees the output shown. What is the most likely cause of the failure?
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 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 service is disabled and needs to be enabled.
Why it's wrong here
The service is enabled; the failure is due to an address conflict.
- ✗
The SSH service is masked and cannot start.
Why it's wrong here
The output shows the service is loaded and enabled, not masked.
- ✗
The SSH configuration file has a syntax error.
Why it's wrong here
The error message points to address conflict, not syntax.
- ✓
Another process is already listening on port 22.
Why this is correct
The error 'Address already in use' indicates port 22 is occupied.
Go deeper
Related to this question
Learn chapter
Process Management and System Monitoring
Key term
Output
In IT service management, output is the result or deliverable produced by a process, system, or component, such as data, reports, or services delivered to a customer.
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.