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CompTIA Network+ Practice

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

Pass mark 42/60 90 minutes CompTIA How many can I get wrong?
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Try 3 real CompTIA Network+ Practice questions
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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
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✓ 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.
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Networking fundamentals & OSI model · 46
Network implementations & topologies · 45
IP addressing & subnetting · 49
Network operations & monitoring · 47
Network security · 45
Troubleshooting · 45
CompTIA Network+ Practice — common questions
Frequently asked
How many questions are in the CompTIA Network+ Practice?
The exam has 60 questions. Every Revision Robin mock uses the same 60-question format so your practice matches the real thing.
What is the pass mark for the CompTIA Network+ Practice?
You need 42 out of 60 correct to pass, which is about 70%. Our mocks mark you against this exact threshold.
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.