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Read each scenario carefully and choose your answer before revealing the explanation. Then check why your choice was right or wrong. Repeat until the reasoning feels automatic.

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200-901 · topic practice

Network Fundamentals practice questions

Practise Cisco DevNet Associate 200-901 Network Fundamentals practice questions — original exam-style scenarios with answer choices, explanations, and analysis of common mistakes.

Courseiva uses original exam-style practice questions designed for learning and revision. The goal is to understand the concepts, recognise exam patterns, and improve through explanations — not memorise copied exam dumps.

Reviewed byJohnson Ajibi· MSc IT Security

20 questionsDomain: Network Fundamentals

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What the exam tests

What to know about Network Fundamentals

Network Fundamentals questions test whether you can apply the concept in context, not just recognise a definition.

How the topic appears in realistic exam-style scenarios.

Which detail in the question changes the correct answer.

How to eliminate plausible but wrong options.

How to connect the question back to the wider exam objective.

Watch out for

Common Network Fundamentals exam traps

▸Answering from memory before reading the full scenario.
▸Missing a constraint such as cost, availability, security, scope or command context.
▸Choosing a broad answer when the question asks for the most specific fix.
▸Ignoring why the wrong options are tempting.

Practice set

Network Fundamentals questions

20 questions · select your answer, then reveal the explanation

Question 1easymultiple choice

Review the full routing breakdown →

In the OSI model, which layer is responsible for logical addressing and routing of packets between networks?

Trap 1: Layer 1 (Physical)

Layer 1 deals with bits and physical media.

Trap 2: Layer 4 (Transport)

Layer 4 manages end-to-end communication and segmentation.

Trap 3: Layer 2 (Data Link)

Layer 2 uses MAC addresses and switches for local delivery.

Study all Network Fundamentals common traps →

A
Layer 1 (Physical)
Why wrong: Layer 1 deals with bits and physical media.
B
Layer 3 (Network)
Correct. Layer 3 uses IP addresses and routers.
C
Layer 4 (Transport)
Why wrong: Layer 4 manages end-to-end communication and segmentation.
D
Layer 2 (Data Link)
Why wrong: Layer 2 uses MAC addresses and switches for local delivery.

Network Fundamentals practice questions

What to know about Network Fundamentals

Common Network Fundamentals exam traps

Network Fundamentals questions

In the OSI model, which layer is responsible for logical addressing and routing of packets between networks?

Which transport protocol is connection-oriented and ensures reliable delivery through acknowledgments and retransmissions?

A DNS AAAA record is used to resolve a hostname to what type of address?

A network engineer is designing a subnet that needs to support 30 usable hosts. Which subnet mask should be used?

Which HTTP method is idempotent and used to update a resource by sending the full representation?

In the context of SDN, which API is used between the SDN controller and the network devices to configure forwarding behavior?

A network administrator is configuring a wireless network and wants to minimize interference. In the 2.4 GHz band, which set of channels are non-overlapping?

During a TCP three-way handshake, which sequence of flags is sent from the client to initiate the connection?

Which of the following is a private IPv4 address range as defined by RFC 1918?

A developer is writing a Python script to interact with a REST API. The API requires a JSON payload to create a new resource. Which HTTP method should be used?

Which DNS record type is used to verify domain ownership for email security protocols like SPF and DKIM?

Which layer of the OSI model uses MAC addresses to deliver frames within the same network segment?

Which TWO of the following are characteristics of UDP compared to TCP? (Select two.)

Which THREE of the following are true about HTTP/2 compared to HTTP/1.1? (Select three.)

Which TWO of the following are valid private IPv4 address ranges? (Select two.)

An engineer is troubleshooting a connectivity issue between two devices on different VLANs. The switch connecting the devices is configured with 802.1Q trunking. At which OSI layer do VLANs operate?

A network application requires reliable, ordered delivery of data and uses a three-way handshake to establish a connection. Which transport protocol is being used?

A network administrator needs to assign IP addresses to devices on a subnet with a /25 prefix. How many usable host addresses are available?

A developer is building a real-time video streaming application that must minimize delay, even if some packets are lost. Which transport protocol is most appropriate, and why?

Which DNS record type is used to map a domain name to an IPv6 address?

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