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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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N10-009 · topic practice

Network Fundamentals practice questions

Practise CompTIA Network+ N10-009 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 →

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

Trap 1: Data Link layer

The Data Link layer (Layer 2) is responsible for physical addressing (MAC) and framing.

Trap 2: Transport layer

The Transport layer (Layer 4) ensures reliable end-to-end communication and segmentation.

Trap 3: Application layer

The Application layer (Layer 7) provides network services to user applications.

Study all Network Fundamentals common traps →

A
Data Link layer
Why wrong: The Data Link layer (Layer 2) is responsible for physical addressing (MAC) and framing.
B
Network layer
The Network layer provides logical addressing and routing functions, enabling communication across different networks.
C
Transport layer
Why wrong: The Transport layer (Layer 4) ensures reliable end-to-end communication and segmentation.
D
Application layer
Why wrong: The Application layer (Layer 7) provides network services to user applications.

Network Fundamentals practice questions

What to know about Network Fundamentals

Common Network Fundamentals exam traps

Network Fundamentals questions

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

Which of the following is a characteristic of a Layer 2 network switch?

Which of the following network devices operates primarily at Layer 2 of the OSI model and uses MAC addresses to forward data?

Which of the following IPv6 addresses is a valid link-local address?

Which of the following security mechanisms requires a user to authenticate before gaining access to the wired network at a switch port?

Which of the following network topologies provides the highest level of redundancy and fault tolerance?

Which of the following protocols is used to automatically assign IP addresses to devices on a network?

An organization uses OSPF as its interior gateway protocol in a multi-area design. After a core router failure, the network takes several seconds to reconverge. Which technology can be implemented to improve convergence speed?

A user reports slow network performance on their workstation. The technician checks the switch port and sees a high number of CRC errors. Which of the following is the MOST likely cause of this issue?

Which of the following network protocols operates at the Transport layer of the OSI model and provides connection-oriented, reliable data delivery?

Which of the following uniquely identifies a hardware network interface on a device?

A company wants to allow inbound HTTPS traffic to a web server located in the DMZ from the Internet. The firewall has three interfaces: Inside (corporate network), Outside (Internet), and DMZ (web server). Which of the following firewall rules is required?

Which of the following network devices operates at Layer 1 of the OSI model and forwards all incoming electrical signals to all of its ports?

A network administrator wants to ensure that only authorized devices can access the network on a switch port. The administrator has a list of allowed MAC addresses. Which security feature should be enabled on the switch port?

A network administrator is configuring BGP between two autonomous systems. Which BGP attribute is primarily used to influence inbound traffic to a particular AS?

A network administrator needs to be notified immediately when the CPU utilization on a core router exceeds 90%. Which SNMP mechanism should be configured on the router?

A network device receives a frame on one port and forwards it out to all other ports. The device does not examine the destination MAC address. Which type of device is being described?

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