CompTIA JK0-023 Exam Questions
CompTIA Network+ certification (Page 27 )

Updated On: 17-Feb-2026
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Which of the following ports would Zach, a technician, need to open on a firewall to allow SSH on the default port?

  1. 20
  2. 21
  3. 22
  4. 23

Answer(s): C



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Frames are the Protocol Data Unit for which of the following layers of the OSI model?

  1. Layer 1
  2. Layer 2
  3. Layer 3
  4. Layer 4

Answer(s): B



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Which of the following BEST describes a switch port?

  1. Broadcast domain
  2. Distance vector
  3. Link state
  4. Collision domain

Answer(s): D



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Which of the following uses a 128-bit addressing scheme?

  1. MAC
  2. DHCP
  3. IPv4
  4. IPv6

Answer(s): D



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Which of the following has the LEAST amount of collisions in a domain?

  1. Bridge
  2. Hub
  3. Repeater
  4. Switch

Answer(s): D






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