CompTIA Network+ certification - JK0-023

CompTIA JK0-023 test insides dumps
  • Exam Code: JK0-023
  • Exam Name: CompTIA Network+ certification
  • Updated: Jul 21, 2026
  • Q & A: 995 Questions and Answers
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CompTIA JK0-023 Exam Syllabus Topics:
SectionObjectives
Network Management- Network monitoring and troubleshooting
  • 1. Performance monitoring concepts
    • 2. Common network troubleshooting tools
      - Network configuration and documentation
      • 1. Subnetting fundamentals
        • 2. IP addressing basics (IPv4/IPv6)
          Network Security- Security principles
          • 1. Authentication and authorization concepts
            • 2. Encryption and secure protocols
              - Network attacks and mitigation
              • 1. Firewalls and access control
                • 2. Common network threats
                  Network Media and Topologies- Topologies
                  • 1. Star, mesh, bus, and hybrid topologies
                    - Wireless standards
                    • 1. 802.11 standards overview
                      Network Technologies- Cabling and connectors
                      • 1. Copper and fiber media types
                        • 2. Ethernet standards and wiring schemes
                          - Network devices and infrastructure
                          • 1. Routers, switches, hubs, and bridges
                            • 2. Wireless networking components
                              CompTIA Network+ certification Sample Questions:

                              1. Which of the following protocols uses port 3389?

                              A) IMAP
                              B) SSH
                              C) RDP
                              D) DHCP


                              2. A network technician is using a network monitoring system and notices that every device on a particular segment has lost connectivity. Which of the following should the network technician do NEXT?

                              A) Document actions and findings.
                              B) Determine if anything has changed.
                              C) Establish a theory of probable cause.
                              D) Determine next steps to solve the problem.


                              3. Which of the following network topologies would be separated into two networks if a client in the middle is removed or the cable is cut?

                              A) Ring
                              B) Star
                              C) Bus
                              D) Mesh


                              4. Jeff, a technician, has been asked to add a subnet to the company's LAN. Which of the following interfaces on the router will be modified?

                              A) Console 0
                              B) AUX 0
                              C) FastEthernet 0/0
                              D) Serial 0/0/0


                              5. Which of the following diagnostic commands relies on proper forwarding of ICMP ECHO packets?

                              A) ifconfig
                              B) ping
                              C) nbtstat
                              D) route


                              Solutions:

                              Question # 1
                              Answer: C
                              Question # 2
                              Answer: B
                              Question # 3
                              Answer: C
                              Question # 4
                              Answer: C
                              Question # 5
                              Answer: B

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