how should you upgrade the SRX cluster?

In planning for your core data center’s SRX5800 cluster software upgrade, minimal downtime is requested by your management team.

With a goal to achieve maximum uptime, how should you upgrade the SRX cluster?

A.
Preload the software onto the SRX devices and then issue the following command at the same time on both SRX devices: request system software add <package-name> reboot

B.
Use in-service software upgrade using the following command: request system software in- service-upgrade <package-name> reboot.

C.
Preload the software onto the SRX devices and then issue the following command at the same time on both SRX devices: request system software add no-validate <package-name> reboot.

D.
Use an in-service software upgrade using the following command: request system software in- service upgrade <package-name> restart.