Which command is used to roll back to the previously running Junos OS version after an upgrade?

request system software rollback

An engineer is upgrading a Junos device and wants to ensure that the upgrade can be rolled back if necessary. What should the engineer do before starting the upgrade?

Save the current configuration and ensure the previous software version is available on the device.

Disable all interfaces to prevent traffic during the upgrade.

Delete the current configuration to avoid conflicts.

Reboot the device to clear temporary files.

Which command is used to add a new software package to a Junos device?

request system software replace

request system software validate

A Junos device was upgraded to a new version, and the engineer discovers that the new version is incompatible with a critical application. The engineer decides to downgrade to the previous version. However, the previous version is not available on the device. What should the engineer do?

Download the previous version and install it using the 'request system software add' command.

Use the 'load rescue' command to restore the previous configuration and software.

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

Reboot the device and select the previous version from the boot menu.

Juniper NetworksCertified Associate, Junos

Domain 5Objective 4

Junos OS Installation and Upgrades JN0-105 Practice Questions (Page 5)

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 21–24

21foundation · easy
Which command is used to roll back to the previously running Junos OS version after an upgrade?
Select an answer first
22application · medium
An engineer is upgrading a Junos device and wants to ensure that the upgrade can be rolled back if necessary. What should the engineer do before starting the upgrade?
Select an answer first
23foundation · easy
Which command is used to add a new software package to a Junos device?
Select an answer first
24expert · hard
A Junos device was upgraded to a new version, and the engineer discovers that the new version is incompatible with a critical application. The engineer decides to downgrade to the previous version. However, the previous version is not available on the device. What should the engineer do?
Select an answer first

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