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Junos OS Fundamentals Flashcards

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  1. What is the primary function of the Junos OS?

    Answer: Serve as a modular and scalable network operating system

    Junos OS is designed for high-performance routing, switching, and security in network devices.

  2. Which component is responsible for controlling and managing the Junos OS?

    Answer: Routing Engine (RE)

    The Routing Engine handles control plane functions, such as routing protocols and system management.

  3. How is the Junos OS configuration organized?

    Answer: A hierarchical structure

    Junos OS uses a hierarchical configuration structure that allows for intuitive navigation and management.

  4. What command is used to enter configuration mode in Junos OS?

    Answer: configure

    The configure command switches the user from operational mode to configuration mode.

  5. In Junos OS, what is the purpose of the commit command?

    Answer: Apply the candidate configuration to the active configuration

    The commit command applies the candidate configuration to the active system configuration.

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Sources & references

Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy

  1. learningportal.juniper.net — Test delivery, eligibility, exam format, score release, time limit, exam information · verified Nov 2026
  2. juniper.net — Passing score, score validity, renewal · verified Oct 2026