Software Upgrade and Maintenance JN0-352 Practice Questions (Page 2)

Questions 6–10

1. 6foundation · easy

   Which benefit does unified ISSU provide compared to a traditional software upgrade?

   • AIt eliminates the need for a maintenance window because traffic forwarding is not interrupted
   • BIt reduces the time needed to download the software image
   • CIt guarantees that no configuration changes are required after the upgrade
   • DIt automatically rolls back the software if any error occurs
   Reveal Solution Discussion Select an answer first
2. 7application · medium

   A network engineer plans to perform a unified ISSU on a dual-RE EX4600 switch. The switch is currently running Junos 18.4R3 and the target is 20.2R2. The engineer checks the ISSU support matrix and finds that the upgrade path is supported. Which additional prerequisite must be verified before starting the ISSU?

   • AThe switch must have a minimum of 4 GB of free flash storage
   • BBoth Routing Engines must be running the same software version
   • CThe switch must be in a chassis cluster
   • DThe switch must be configured for nonstop bridging (NSB)
   Reveal Solution Discussion Select an answer first
4. 8application · medium

   A network engineer is planning a unified ISSU on a dual-RE router. The router is currently running Junos 19.4R2, and the target is 21.1R1. The engineer checks the ISSU support matrix and finds that the path from 19.4R2 to 21.1R1 is not supported. What is the most appropriate action to still perform the upgrade with minimal disruption?

   • AUse the request system software add command without ISSU
   • BReboot the router with the new software, accepting a brief outage
   • CPerform the ISSU anyway, as the support matrix is only a guideline
   • DUpgrade to an intermediate version that is supported, then perform the ISSU to the target
   Reveal Solution Discussion Select an answer first
5. 9expert · hard

   An engineer is performing a unified ISSU on a dual-RE router. After the upgrade phase completes, the engineer wants to verify that the new software is functioning correctly. The engineer checks the ISSU status and sees that the backup RE is running the new version, but the primary RE is still running the old version. What is the most appropriate action?

   • AWait for the ISSU process to complete the switchover
   • BManually switch over to the backup RE
   • CPerform a rollback to the previous version
   • DReboot the primary RE to load the new software
   Reveal Solution Discussion Select an answer first
6. 10foundation · easy

   What is the purpose of rollback in the context of a unified ISSU?

   • ATo reboot the device to clear any errors
   • BTo restore the configuration to a previous state
   • CTo reinstall the same software version
   • DTo revert to the previous software version if the ISSU fails
   Reveal Solution Discussion Select an answer first