CompTIA JK0-023 : CompTIA Network+ certification
- Exam Code: JK0-023
- Exam Name: CompTIA Network+ certification
- Updated: Oct 12, 2026
- Q & A: 995 Questions and Answers
About CompTIA JK0-023 Exam
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CompTIA JK0-023 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Industry Standards, Practices, and Network Theory | 20% | - Standards and protocols - Communication and professional conduct - Safety and environmental procedures - Network evolution and emerging technologies |
| Network Operations | 20% | - Network policies and best practices - Business continuity and disaster recovery - Monitoring and documentation - Remote access and management |
| Network Troubleshooting | 20% | - Cable and connectivity issues - Troubleshooting methodology - IP addressing and routing problems - Wireless and security troubleshooting |
| Network Security | 20% | - Threats, vulnerabilities, and mitigation - Authentication and access control - Encryption and secure protocols - Security devices and technologies |
| Network Architecture | 20% | - Routing and switching technologies - Network topologies and types - Network services and cloud concepts - OSI and TCP/IP models - IP addressing and subnetting |
CompTIA Network+ certification Sample Questions:
Which of the following is MOST commonly implemented for remote access to UNIX systems?
- A. RSH
- B. SSH
- C. SSL
- D. RDP
Correct Answer: B 🗳️
An administrator is using a packet sniffer to try to determine what is causing the traffic on the network. The administrator sees a lot of packets on port 25. Which of the following traffic types is MOST likely using port 25?
- A. DNS
- B. SSH
- C. SMTP
- D. TELNET
Correct Answer: C 🗳️
A network technician has been asked to look into a report from the IDS to determine why traffic is being sent from an internal FTP server to an external website. Which of the following tools can be used to inspect this traffic?
- A. Throughput tester
- B. Ping and traceroute
- C. Protocol analyzer
- D. Router firewall
Correct Answer: C 🗳️
A network administrator recently installed a web proxy server at a customer's site. The following week, a system administrator replaced the DNS server overnight. The next day, customers began having issues accessing public websites. Which of the following will resolve the issue?
- A. Reboot the web proxy and then reboot the DNS server.
- B. Implement a split horizon DNS server.
- C. Put the proxy server on the other side of the demarc.
- D. Update the DNS server with the proxy server information.
Correct Answer: D 🗳️
Which of the following protocols would the network administrator use to protect login credentials when accessing a router terminal session?
- A. SCP
- B. SNMPv3
- C. SSH
- D. SSL
Correct Answer: C 🗳️
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