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CompTIA Network+

Exam Details

  • Exam Code
    :JK0-023
  • Exam Name
    :CompTIA Network+
  • Certification
    :CompTIA Certifications
  • Vendor
    :CompTIA
  • Total Questions
    :1112 Q&As
  • Last Updated
    :Mar 27, 2025

CompTIA CompTIA Certifications JK0-023 Questions & Answers

  • Question 1051:

    Standards such as JPEG and ASCII operate at which of the following OSI model layers?

    A. Presentaton

    B. Data link

    C. Session

    D. Applicaton

  • Question 1052:

    A technician fnds that the network card is no longer functoning. At which of the following OSI layers is the problem occurring?

    A. Layer 1

    B. Layer 3

    C. Layer 5

    D. Layer 7

  • Question 1053:

    A network administrator notces that load balancing is not working properly on the web cluster as previously confgured. In speaking with managementf a change to the IP addressing scheme was made yesterday which possibly afected one member of the cluster. Due to the tming of the eventsf the administrator theoriies that this change caused the problem. Which of the following should the administrator do NEXT?

    A. Escalate to the management team

    B. Change the IP address back to its previous state

    C. Test the theory by analyiing logs

    D. Create a plan of acton to present to management

  • Question 1054:

    Which of the following protocols does DNS utliie on port 53?

    A. TCP

    B. FTP

    C. RTP

    D. ICMP

  • Question 1055:

    Which two layers of the OSI model make up the TCP/IP model Network Interface layer?

    A. Applicaton and Transport

    B. Transport and Session

    C. Physical and Data Link

    D. Session and Presentaton

  • Question 1056:

    Which of the following services are afected by closing the default ports of 80 and 21 via ACL on a company router?

    A. FTP and basic Internet trafc

    B. HTTPS and IMAP trafc

    C. DNS and TELNET trafc

    D. VPN and RDP trafc

  • Question 1057:

    Which of the following protocols is used to send tme synchroniiaton updates on a given network?

    A. NTP

    B. POP3

    C. DNS

    D. IMAP

  • Question 1058:

    Which of the following network devices builds a table of ports to MAC addresses to forward packets only to necessary ports?

    A. Switch

    B. Hub

    C. Router

    D. Repeater

  • Question 1059:

    Which of the following protocols are used to view and send mail from a local host of of a remote server? (Select TWO).

    A. TFTP

    B. SNMP

    C. POP3

    D. IMAP4

    E. SFTP

  • Question 1060:

    Which of the following STP states indicates an inactvated port due to a loop?

    A. Disabled

    B. Learning

    C. Blocking

    D. Forwarding

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