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XK0-006 Practice Question: Refer to the exhibit

Exhibit

journalctl -xe -u NetworkManager.service
Mar 13 10:22:15 hostname NetworkManager[1023]: <warn>  [1678710135.1234] device (eth0): Activation: failed for connection 'Wired connection 1'
Mar 13 10:22:15 hostname NetworkManager[1023]: <info>  [1678710135.1235] device (eth0): state change: failed -> disconnected (reason 'none', sys-iface-state: 'managed')
Mar 13 10:22:15 hostname NetworkManager[1023]: <warn>  [1678710135.1236] device (eth0): Activation: failed to connect: No suitable device found

Refer to the exhibit. A network administrator is troubleshooting a failed network connection. Based on the journalctl output, 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

✓

The network interface eth0 is not physically connected.

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 NetworkManager service is not running.

    Why it's wrong here

    The logs show NetworkManager is actively processing the interface.

  • ✓

    The network interface eth0 is not physically connected.

    Why this is correct

    'No suitable device found' suggests the interface is not available or not plugged in.

  • ✗

    The network configuration file has an invalid IP address.

    Why it's wrong here

    The error is about device suitability, not IP configuration.

  • ✗

    The DHCP server is unreachable.

    Why it's wrong here

    DHCP failure would produce a different error message.

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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.