Question 308 of 1,000

Network Fundamentals →hardMultiple ChoiceObjective-mapped

200-901 Network Fundamentals Practice Question

This 200-901 practice question tests your understanding of network fundamentals. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 network engineer is subnetting the network 192.168.1.0/24 into subnets that each support at least 50 hosts. What subnet mask should be used?

Clue words in this question

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

Clue: "least"
Why it matters: You want the option with minimum overhead, fewest steps, or lowest impact — not the most feature-rich or comprehensive answer.

A
255.255.255.192 (/26)
/26 provides 62 hosts, meeting the requirement.
B
255.255.255.224 (/27)
Why wrong: /27 gives only 30 hosts, insufficient.
C
255.255.255.240 (/28)
Why wrong: /28 gives only 14 hosts.
D
255.255.255.128 (/25)
Why wrong: /25 gives 126 hosts per subnet but only 2 subnets.

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

✓

255.255.255.192 (/26)

To support at least 50 hosts, you need 6 host bits (2^6 - 2 = 62 usable addresses). A /26 subnet mask (255.255.255.192) provides exactly 6 host bits, meeting the requirement. The original /24 network is borrowed with 2 subnet bits, yielding 4 subnets of 64 addresses each.

Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

Answer analysis

Option-by-option breakdown

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

✓
255.255.255.192 (/26)
Why this is correct
/26 provides 62 hosts, meeting the requirement.
Clue confirmation
The clue word "least" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
255.255.255.224 (/27)
Why it's wrong here
/27 gives only 30 hosts, insufficient.
✗
255.255.255.240 (/28)
Why it's wrong here
/28 gives only 14 hosts.
✗
255.255.255.128 (/25)
Why it's wrong here
/25 gives 126 hosts per subnet but only 2 subnets.

Common exam traps

Common exam trap: answer the scenario, not the keyword

Cisco often tests the distinction between the number of host bits needed versus the number of subnet bits, and the trap here is that candidates may choose /25 because it supports more hosts, overlooking that /26 is the minimum mask that meets the 50-host requirement and is the correct answer per the question's wording.

Detailed technical explanation

How to think about this question

The formula for usable hosts per subnet is 2^(32 - prefix_length) - 2, subtracting the network and broadcast addresses. In practice, subnetting a /24 into /26 subnets is common for VLANs in campus networks, where each subnet supports up to 62 devices, balancing address efficiency and growth. Cisco IOS uses the 'ip subnet-zero' command (enabled by default) to allow use of the first and last subnets, which is relevant when calculating subnet IDs.

KKey Concepts to Remember

Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.

TExam Day Tips

Watch for words such as best, first, most likely and least administrative effort.
Review why wrong options are wrong, not only why the correct option is correct.

Key takeaway

Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

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.

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

Related 200-901 practice-question pages

Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.

Software Development and Design practice questions

Practise 200-901 questions linked to Software Development and Design.

Understanding and Using APIs practice questions

Practise 200-901 questions linked to Understanding and Using APIs.

Application Deployment and Security practice questions

Practise 200-901 questions linked to Application Deployment and Security.

Cisco Platforms and Development practice questions

Practise 200-901 questions linked to Cisco Platforms and Development.

Network Fundamentals practice questions

Practise 200-901 questions linked to Network Fundamentals.

Infrastructure and Automation practice questions

Practise 200-901 questions linked to Infrastructure and Automation.

200-901 fundamentals practice questions

Practise 200-901 questions linked to 200-901 fundamentals.

200-901 scenario practice questions

Practise 200-901 questions linked to 200-901 scenario.

200-901 troubleshooting practice questions

Practise 200-901 questions linked to 200-901 troubleshooting.

Practice this exam

Start a free 200-901 practice session

Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.

10 questions 20 questions 30 questions 50 questions Timed 30

200-901 practice-test guide →Study guide →Browse all practice tests

FAQ

Questions learners often ask

What does this 200-901 question test?

Network Fundamentals — This question tests Network Fundamentals — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: 255.255.255.192 (/26) — To support at least 50 hosts, you need 6 host bits (2^6 - 2 = 62 usable addresses). A /26 subnet mask (255.255.255.192) provides exactly 6 host bits, meeting the requirement. The original /24 network is borrowed with 2 subnet bits, yielding 4 subnets of 64 addresses each.

What should I do if I get this 200-901 question wrong?

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

Are there clue words in this question I should notice?

Yes — watch for: "least". You want the option with minimum overhead, fewest steps, or lowest impact — not the most feature-rich or comprehensive answer.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

About these practice questions

Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →

How Courseiva writes practice questions · Editorial policy

Last reviewed: Jul 4, 2026

Question Discussion

Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.

Loading comments…

This 200-901 practice question is part of Courseiva's free Cisco 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 200-901 exam.