CompTIA JK0-023 exam : CompTIA Network+ certification

JK0-023 Exam Simulator
  • Exam Code: JK0-023
  • Exam Name: CompTIA Network+ certification
  • Updated: Sep 13, 2026
  • Q & A: 995 Questions and Answers

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CompTIA JK0-023 Exam Syllabus Topics:

SectionObjectives
Topic 1: Network Technologies- Cabling and connectors
  • 1. Ethernet standards and wiring schemes
    • 2. Copper and fiber media types
      - Network devices and infrastructure
      • 1. Wireless networking components
        • 2. Routers, switches, hubs, and bridges
          Topic 2: Network Security- Security principles
          • 1. Encryption and secure protocols
            • 2. Authentication and authorization concepts
              - Network attacks and mitigation
              • 1. Common network threats
                • 2. Firewalls and access control
                  Topic 3: Network Management- Network configuration and documentation
                  • 1. Subnetting fundamentals
                    • 2. IP addressing basics (IPv4/IPv6)
                      - Network monitoring and troubleshooting
                      • 1. Performance monitoring concepts
                        • 2. Common network troubleshooting tools
                          Topic 4: Network Media and Topologies- Topologies
                          • 1. Star, mesh, bus, and hybrid topologies
                            - Wireless standards
                            • 1. 802.11 standards overview

                              CompTIA Network+ certification Sample Questions:

                              Question #1

                              A network administrator suspects an employee of using the company's Internet connection to download illegal content. Which of the following can be used to inspect ongoing network traffic?

                              • A. Toner probe
                              • B. OTDR
                              • C. Syslog server
                              • D. Packet sniffer
                              Reveal Solution  Discussion  0

                              Correct Answer: D  🗳️

                              Question #2

                              A company has changed ISPs for their office and ordered a new 250 Mbps symmetrical Internet connection. As a result, they have been given a new IP range. The ISP has assigned the company 10.10.150.16 /28. The company gateway router has the following interface configuration facing the ISP:
                              Interface A:
                              IP address: 10.10.150.16
                              Subnet mask: 255.255.255.240
                              Default gateway: 10.10.150.32
                              Speed: 1000 Mbps
                              Duplex: Auto
                              State: No Shutdown
                              None of the workstations at the company are able to access the Internet. Which of the following are the reasons? (Select TWO).

                              • A. The router interface is turned off.
                              • B. The router interface is configured with the incorrect IP address.
                              • C. The interface is set to the incorrect speed.
                              • D. There is a duplex mismatch between the router and ISP.
                              • E. The default gateway is configured incorrectly.
                              • F. The router is configured with the incorrect subnet mask.
                              Reveal Solution  Discussion  0

                              Correct Answer: B,E  🗳️

                              Question #3

                              Which of the following wireless parameters may need to be modified when a new cordless telephone is installed?

                              • A. Encryption type
                              • B. Channel
                              • C. IP address
                              • D. SSID
                              Reveal Solution  Discussion  0

                              Correct Answer: B  🗳️

                              Question #4

                              Sandy, an administrator, needs to install a wireless network that will allow legacy devices to connect to the network and also offer both 5GHz and 2.4GHz frequencies. Which of the following would BEST describe the type of WAP needed?

                              • A. 802.11a
                              • B. 802.11n
                              • C. 802.11b
                              • D. 802.11g
                              Reveal Solution  Discussion  0

                              Correct Answer: B  🗳️

                              Question #5

                              Which of the following exist at layer three of the OSI model? (Select TWO).

                              • A. Switch
                              • B. Cable
                              • C. NIC
                              • D. Packet
                              • E. Frame
                              • F. Router
                              Reveal Solution  Discussion  0

                              Correct Answer: D,F  🗳️

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