CompTIA JK0-023 real exam prep : CompTIA Network+ certification

  • Exam Code: JK0-023
  • Exam Name: CompTIA Network+ certification
  • Updated: Sep 26, 2026
  • Q&As: 995 Questions and Answers

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CompTIA JK0-023 Exam Syllabus Topics:

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

                              CompTIA Network+ certification Sample Questions:

                              Question #1

                              A technician installs a new CAT6 cable from one end of the office building to another, a total distance of 600 feet (182.88 meters). When a laptop is connected to the cable, it cannot connect to the Internet. Which of the following is MOST likely the cause of this problem?

                              • A. Bad connectors
                              • B. TXRX reversed
                              • C. DB loss
                              • D. Crosstalk
                              Reveal Solution  Discussion  0

                              Correct Answer: C  🗳️

                              Question #2

                              An administrator notices an unused cable behind a cabinet that is terminated with a DB-9 connector. Which of the following protocols was MOST likely used on this cable?

                              • A. Token ring
                              • B. RS-232
                              • C. ATM
                              • D. 802.3
                              Reveal Solution  Discussion  0

                              Correct Answer: B  🗳️

                              Question #3

                              A network technician is attempting to connect a new host to existing manufacturing equipment on an Ethernet network. The technician is having issues trying to establish communication between the old equipment and the new host. The technician checks the cabling for breaks and finds that the CAT3 cable in use is in perfect condition. Which of the following should the technician check to ensure the new host will connect?

                              • A. Confirm the existing 10Base2 equipment is using the proper frame type
                              • B. Confirm the new host is compatible with 10BaseT Ethernet
                              • C. Confirm the new host is using 10GBaseSR due to the manufacturing environment
                              • D. Confirm that CSMA/CD is disabled on the Ethernet network
                              Reveal Solution  Discussion  0

                              Correct Answer: B  🗳️

                              Question #4

                              Which of the following would Karen, a technician, do to monitor remote traffic through an access point?

                              • A. Select WPA2
                              • B. Enable an SNMP agent
                              • C. Enable network mapping
                              • D. Set monitoring SSID
                              Reveal Solution  Discussion  0

                              Correct Answer: B  🗳️

                              Question #5

                              Which of the following can be used to limit wireless network access to a single computer?

                              • A. Configure PPP
                              • B. MAC address filtering
                              • C. Packet sniffing
                              • D. Omni-directional antennas
                              Reveal Solution  Discussion  0

                              Correct Answer: B  🗳️

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