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CompTIA Network+ 2024 past questions and answers

This 2024 CompTIA Network+ set has 19 practice questions. Try these 5 free sample questions, tap a question to reveal the answer and explanation. Then practise the whole 2024 set with instant marking.

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Sample CompTIA Network+ 2024 questions

1. A switch receives an Ethernet frame, removes its Layer 2 header and trailer, and passes the resulting packet to its IP process. Which OSI-layer function is being performed at that point?
  1. Transport-layer segmentation
  2. Network-layer processing
  3. Physical-layer encoding
  4. Application-layer presentation

Answer: B. Network-layer processing

The Ethernet frame is a Layer 2 PDU; its payload is the Layer 3 IP packet, which the switch's IP process can inspect. Segmentation is a transport function, while encoding is physical-layer work.

2. A technician sees that an IPv6 interface has an address beginning with fe80:: and a /64 prefix. What is the primary purpose of this address?
  1. It is a globally routable address assigned by an ISP
  2. It identifies a multicast group
  3. It provides link-local communication on the local segment
  4. It is an IPv4-mapped address for NAT64

Answer: C. It provides link-local communication on the local segment

IPv6 addresses in fe80::/10 are link-local and support communication on the local link, such as neighbor discovery. They are not globally routable and are not multicast addresses.

3. A DNS administrator is transferring an entire zone from a primary server to a secondary server. Which transport and port should be permitted between the servers for this transfer?
  1. UDP 53
  2. TCP 53
  3. TCP 25
  4. UDP 123

Answer: B. TCP 53

DNS zone transfers use TCP port 53 to reliably transfer the zone data. UDP 53 is commonly used for ordinary DNS queries, but it is not the expected transport for a zone transfer.

4. A switch port must carry traffic for several VLANs between two switches while preserving VLAN identification. Which configuration is appropriate?
  1. Configure the link as an 802.1Q trunk
  2. Configure the link as an access port in the native VLAN
  3. Enable port mirroring on both switches
  4. Assign the link an IPv6 link-local address

Answer: A. Configure the link as an 802.1Q trunk

An IEEE 802.1Q trunk carries multiple VLANs and tags frames to identify their VLAN. An access port normally carries a single VLAN and would not provide the required multi-VLAN link.

5. A new access point requires 25 W at its powered-device input. The switch's available PoE standard supplies at most 15.4 W at the PSE. Which upgrade meets the access point's requirement?
  1. IEEE 802.3af
  2. IEEE 802.3at
  3. IEEE 802.1Q
  4. IEEE 802.11n

Answer: B. IEEE 802.3at

IEEE 802.3at (PoE+) provides up to 30 W at the power sourcing equipment, enough for this 25 W device. IEEE 802.3af provides up to 15.4 W at the PSE and is insufficient.

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