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CompTIA JK0-023

JK0-023

Exam Code: JK0-023

Exam Name: CompTIA Network+ certification

Updated: Aug 10, 2026

Q & A: 995 Questions and Answers

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CompTIA JK0-023 Exam Syllabus Topics:

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

                              CompTIA Network+ certification Sample Questions:

                              1. A network administrator tests a multimode fiber cable from end-to-end on a new link that is down and notices that the dB loss is -.09. Which of the following is the MOST likely cause?

                              A) Bad connectors
                              B) dB loss too low
                              C) dB loss too high
                              D) TXRX reversed


                              2. Which of the following should be mitigated by employing proper coding techniques when developing software?

                              A) War driving
                              B) Buffer overflows
                              C) Packet sniffing
                              D) Distributed denial of service attacks


                              3. Which of the following devices can be used to offload outbound web server SSL encryption overhead?

                              A) Proxy server
                              B) VPN concentrator
                              C) Content filter
                              D) NIPS


                              4. Multiprotocol Label Switching (MPLS) operates at which of the following layers of the OSI model? (Select TWO).

                              A) Layer 4
                              B) Layer 3
                              C) Layer 5
                              D) Layer 2
                              E) Layer 1


                              5. A network administrator wants to monitor traffic by deploying MIBs. Which of the follow network monitoring resources would be used?

                              A) SCTP
                              B) DCCP
                              C) Packet sniffer
                              D) SNMP


                              Solutions:

                              Question # 1
                              Answer: D
                              Question # 2
                              Answer: B
                              Question # 3
                              Answer: A
                              Question # 4
                              Answer: B,D
                              Question # 5
                              Answer: D

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