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CompTIA Network+ 2023 past questions and answers

This 2023 CompTIA Network+ set has 20 practice questions. Try these 5 free sample questions, tap a question to reveal the answer and explanation. Then practise the whole 2023 set with instant marking.

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Sample CompTIA Network+ 2023 questions

1. A technician needs to assign a static host address within 192.168.40.64/27. Which address is a usable host address in that subnet?
  1. 192.168.40.64
  2. 192.168.40.95
  3. 192.168.40.94
  4. 192.168.40.96

Answer: C. 192.168.40.94

A /27 has 32 addresses: .64 is the network address, .95 is the broadcast address, and .65 through .94 are usable hosts. .96 begins the next subnet.

2. An administrator is creating a DNS record for portal.example.net that should resolve directly to the server's IPv4 address. Which record type is required?
  1. A
  2. AAAA
  3. CNAME
  4. MX

Answer: A. A

An A record maps a hostname to an IPv4 address. AAAA is for IPv6, CNAME creates an alias, and MX identifies mail exchangers.

3. A router examines a packet's destination IP address to choose the next hop. At which OSI layer does this forwarding decision primarily occur?
  1. Application
  2. Data Link
  3. Transport
  4. Network

Answer: D. Network

IP addressing and routing are Layer 3, the Network layer, functions. The Data Link layer handles local frame delivery and MAC addresses, not IP route selection.

4. A switch-to-switch link must carry traffic for several VLANs while retaining VLAN identification across the link. Which technology should be configured?
  1. RSTP
  2. IEEE 802.1Q tagging on a trunk
  3. Port security
  4. Link aggregation only

Answer: B. IEEE 802.1Q tagging on a trunk

An 802.1Q trunk tags frames so the receiving switch can associate them with the correct VLAN. RSTP prevents loops, while port security controls endpoint access.

5. A router learns routes through OSPF. Which metric does OSPF use to calculate its preferred path?
  1. Hop count only
  2. Administrative distance alone
  3. BGP path attributes
  4. Cost

Answer: D. Cost

OSPF calculates routes using cost, commonly derived from interface bandwidth. Hop count is the principal metric associated with RIP, not OSPF.

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