Question 682 of 1,000

Troubleshooting →easyMultiple ChoiceObjective-mapped

XK0-005 Troubleshooting Practice Question

This XK0-005 practice question tests your understanding of troubleshooting. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.

A technician wants to check the current IP address and subnet mask of the eth0 interface. Which command should they use?

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

Clue: "which command"
Why it matters: Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.

A
nmcli dev show eth0
Why wrong: nmcli shows NetworkManager details, not directly the IP address.
B
ip route show
Why wrong: ip route shows routing table, not interface addresses.
C
ifconfig eth0
Why wrong: ifconfig is deprecated but still works; however the question may expect ip command.
D
ip addr show dev eth0
Correct: ip addr shows IPv4/IPv6 addresses and masks.

Full breakdown with real-world context →

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

✓

ip addr show dev eth0

The `ip addr show dev eth0` (or `ip addr`) displays IP addresses and subnet masks.

Key principle: Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✗
nmcli dev show eth0
Why it's wrong here
nmcli shows NetworkManager details, not directly the IP address.
✗
ip route show
Why it's wrong here
ip route shows routing table, not interface addresses.
✗
ifconfig eth0
Why it's wrong here
ifconfig is deprecated but still works; however the question may expect ip command.
✓
ip addr show dev eth0
Why this is correct
Correct: ip addr shows IPv4/IPv6 addresses and masks.
Clue confirmation
The clue word "which command" in the question point toward this answer.
Related concept
CIDR notation defines the prefix length.

Common exam traps

Common exam trap: usable hosts are not the same as total addresses

Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.

Trap categories for this question

Command / output trap
nmcli shows NetworkManager details, not directly the IP address.

Detailed technical explanation

How to think about this question

Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.

KKey Concepts to Remember

CIDR notation defines the prefix length.
Block size helps identify subnet boundaries.
Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
The required host count determines the smallest suitable subnet.

TExam Day Tips

Write the block size before choosing the subnet.
Check whether the question asks for hosts, subnets or a specific address range.
Do not confuse /24, /25, /26 and /27 host counts.

Key takeaway

Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.

Real-world example

How this comes up in practice

A network engineer segments a warehouse floor into three subnets: 20 scanners, 5 printers, and 2 management hosts. Picking the wrong mask wastes addresses or leaves too few usable hosts. Exam questions test whether you can apply CIDR notation, calculate block size, and identify the correct usable-host range for a given prefix.

Visual reference

What to study next

Got this wrong? Here's your next step.

Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related XK0-005 subnetting questions on CIDR, address ranges, and subnet selection.

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FAQ

Questions learners often ask

What does this XK0-005 question test?

Troubleshooting — This question tests Troubleshooting — CIDR notation defines the prefix length..

What is the correct answer to this question?

The correct answer is: ip addr show dev eth0 — The `ip addr show dev eth0` (or `ip addr`) displays IP addresses and subnet masks.

What should I do if I get this XK0-005 question wrong?

Are there clue words in this question I should notice?

Yes — watch for: "which command". Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.

What is the key concept behind this question?

CIDR notation defines the prefix length.

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Last reviewed: Jul 4, 2026

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This XK0-005 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 XK0-005 exam.