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CompTIA Network+ Practice

Practice for the CompTIA Network+ (N10-009) cert.

Written against the published CompTIA specification.

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Pass mark 42/60 90 minutes CompTIA How many can I get wrong?
About this practice. Revision Robin is built and maintained by Bloor Engineering Ltd, a UK-registered company. Our CompTIA Network+ Practice questions are written and reviewed in-house to match the current syllabus, each with a plain-English worked explanation. They are original practice material, not the official exam questions and not affiliated with or endorsed by CompTIA. Always confirm current test rules, fees and content with the official provider at CompTIA. See our Terms and Privacy.
Start with a free topic drill, see where you stand, then unlock the full mock.
Free practice questions
Try 3 real CompTIA Network+ Practice questions
Have a go, then reveal the worked explanation. A taster from a bank of 277 original questions. Unlock for unlimited drills and full timed mocks.
Q1. Which OSI layer is responsible for logical addressing and routing packets between different networks?
  • A.  Layer 2 - Data Link
  • B.  Layer 3 - Network
  • C.  Layer 4 - Transport
  • D.  Layer 7 - Application
Show answer & explanation
✓ Answer: B. Layer 3 - Network
The Network layer (Layer 3) handles logical addressing (IP addresses) and routing between networks. Layer 2 only deals with physical/MAC addressing within a single local segment, which is why it cannot route between networks.
Q2. A network technician is designing a small office LAN where every device connects to a central switch. What physical topology is being used?
  • A.  Bus
  • B.  Star
  • C.  Ring
  • D.  Mesh
Show answer & explanation
✓ Answer: B. Star
In a star topology, all devices connect to a central device such as a switch or hub. This is the dominant topology in modern wired LANs because a single cable failure only affects one node rather than the whole network.
Q3. A server has the IP address 172.20.5.10/20. Which of the following is the correct network address for this host?
  • A.  172.20.0.0
  • B.  172.20.4.0
  • C.  172.20.5.0
  • D.  172.20.8.0
Show answer & explanation
✓ Answer: B. 172.20.4.0
A /20 mask is 255.255.240.0, giving a block size of 16 in the third octet. Since 5 falls between 4 and 16, the network address is 172.20.4.0, not 172.20.0.0 which would only be correct for a shorter prefix such as /16.
Exam format (pass mark, question count, timing) verified against CompTIA. Questions are our own, not the official paper.
Exam mode
Full mock exam
60 random questions, real timing, marked against the official pass mark. Different every time.
The first 8 of 60 questions are free, with your score on them. Finishing the paper, your result against the pass mark and every answer explained come with the paid version.
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Topic drills
Ten quick questions on one topic, marked instantly with explanations.
1 free drill left.
Networking fundamentals & OSI model · 46
Network implementations & topologies · 45
IP addressing & subnetting · 49
Network operations & monitoring · 47
Network security · 45
Troubleshooting · 45

The real CompTIA Network+ Practice: format

How many questions are in the CompTIA Network+ Practice?

The real CompTIA Network+ Practice has 90 questions and lasts 90 minutes. Our mock uses 60 questions in 90 minutes.

What is the CompTIA Network+ Practice pass mark?

Real exam pass mark: 720 on a scale of 100-900. Our mock marks you at 42 out of 60, the threshold we mark against.

What it costs, and what a resit costs

How much does the CompTIA Network+ Practice cost?

Real exam fee: £265-£315. Resit fee: £265-£315. Rebooking after a fail: 14 calendar days after a failed attempt.

How hard is it

How hard is the CompTIA Network+ Practice?

Difficulty: Intermediate; requires hands-on experience, strong preparation, and practical application skills for troubleshooting and scenario-based questions.

Why people fail it

Why do people fail the CompTIA Network+ Practice?

Figures for the real exam from vertexaisearch.cloud.google.com, checked October 2026. Fees and rules change, so confirm with the test provider before you book.
CompTIA Network+ Practice: common questions
Frequently asked
How long do you get?
The test is timed at 90 minutes. Our full mock runs on the same clock so you can practise your pacing.
Are these the real exam questions?
No. Our questions are original and written to match the current syllabus, so they give realistic practice without copying the official paper. Every answer comes with a plain-English explanation. Always confirm current rules and content with CompTIA.