After upgrading a Junos device, the engineer notices that the device is not passing traffic as expected. The engineer suspects that the new version may have changed the default behavior of a feature. What is the most effective way to validate the installation and identify the issue?

Use the 'request system software rollback' command to revert to the previous version.

Load the rescue configuration to restore the device to a known-good state.

Review the system logs and compare the current configuration with the previous version's configuration.

Reboot the device to ensure the new version is fully loaded.

A network administrator needs to install Junos OS on a new device that has no existing configuration. The administrator has physical access to the device and a USB drive with the Junos image. Which installation method is most appropriate?

Boot the device from the USB drive and install the software from there.

Use the 'load rescue' command to install the software from the rescue configuration.

Use the 'request system software add' command with a URL to a remote server.

Use the 'request system software replace' command to install the new image.

Which statement correctly describes a network-based installation method for Junos OS?

The device must be connected to the network via a management interface only.

The device downloads the software image from a remote server using a URL such as FTP, HTTP, or TFTP.

Network-based installation is only supported on virtual devices, not physical hardware.

The software image must first be copied to the device's /var/tmp directory using FTP.

A Junos device is running a version that is several releases old. The engineer needs to upgrade to the latest version, but the upgrade path requires installing an intermediate release first. The engineer wants to minimize downtime. What is the best approach?

Install the intermediate release, reboot, then install the final release and reboot again.

Load the rescue configuration to prepare the device for the upgrade.

Install the final release directly, skipping the intermediate release.

Use the 'request system software rollback' command to revert to the previous version and then upgrade.

What is the purpose of the rescue configuration on a Junos device?

To store a known-good configuration that can be loaded if the active configuration is lost or corrupted.

To store a backup of the Junos OS software image.

To provide a default configuration for new devices.

To automatically roll back to the previous OS version on boot.

Juniper NetworksCertified Associate, Junos

Domain 5Objective 4

Junos OS Installation and Upgrades JN0-105 Practice Questions (Page 3)

Part of the Operational Monitoring and Maintenance domain, which makes up ~15% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~5–9 in this domain), expect 1–2 from this objective — we provide 24 practice questions to prepare you well beyond it. (estimate)

24questions here

5free pages

6concepts

Questions 11–15

11expert · hard
After upgrading a Junos device, the engineer notices that the device is not passing traffic as expected. The engineer suspects that the new version may have changed the default behavior of a feature. What is the most effective way to validate the installation and identify the issue?
Select an answer first
12application · medium
A network administrator needs to install Junos OS on a new device that has no existing configuration. The administrator has physical access to the device and a USB drive with the Junos image. Which installation method is most appropriate?
Select an answer first
13foundation · easy
Which statement correctly describes a network-based installation method for Junos OS?
Select an answer first
14expert · hard
A Junos device is running a version that is several releases old. The engineer needs to upgrade to the latest version, but the upgrade path requires installing an intermediate release first. The engineer wants to minimize downtime. What is the best approach?
Select an answer first
15foundation · easy
What is the purpose of the rescue configuration on a Junos device?
Select an answer first

Finished these 5 questions?

Review the revealed explanations, or continue through the curriculum.

Next 5 questions →Back to JN0-105

Free Basic Practice is a study aid with revealable answers — not a scored exam. Examers.io is independent and not affiliated with or endorsed by Juniper Networks. “JN0-105” is a trademark of its owner, used for identification only.