CompTIA Network+ certification : JK0-023

  • Exam Code: JK0-023
  • Exam Name: CompTIA Network+ certification
  • Updated: Aug 05, 2026
  • Q & A: 995 Questions and Answers

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CompTIA JK0-023 Exam Syllabus Topics:

SectionObjectives
Topic 1: 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)
          Topic 2: Network Security- Network attacks and mitigation
          • 1. Firewalls and access control
            • 2. Common network threats
              - Security principles
              • 1. Encryption and secure protocols
                • 2. Authentication and authorization concepts
                  Topic 3: 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 4: Network Media and Topologies- Wireless standards
                          • 1. 802.11 standards overview
                            - Topologies
                            • 1. Star, mesh, bus, and hybrid topologies

                              CompTIA Network+ certification Sample Questions:

                              1. A company has had several virus infections over the past few months. The infections were caused by vulnerabilities in the application versions that are being used. Which of the following should an administrator implement to prevent future outbreaks?

                              A) Incident response team
                              B) Host-based intrusion detection systems
                              C) Acceptable use policies
                              D) Patch management


                              2. Which of the following types of network would be set up in an office so that customers could access the Internet but not be given access to internal resources such as printers and servers?

                              A) Quarantine network
                              B) Wireless network
                              C) Guest network
                              D) Core network


                              3. At which layer of the TCP/IP model would cabling exist?

                              A) Transport
                              B) Internet
                              C) Network Interface
                              D) Application


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


                              5. Which of the following is the difference between 802.11b and 802.11g?

                              A) Speed
                              B) Frequency
                              C) Distance
                              D) Transmission power


                              Solutions:

                              Question # 1
                              Answer: D
                              Question # 2
                              Answer: C
                              Question # 3
                              Answer: C
                              Question # 4
                              Answer: D
                              Question # 5
                              Answer: A

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