Which three statements are true about performing an ISSU on a Junos device? (Choose three.)

A.
Every PFE on each FPC downloads the new software from the backup RE.

B.
ksyncd synchronizes the kernel on the backup RE with the master RE.

C.
The backup RE verifies disk space on both REs, unsupported configurations, and unsupported
PICs.

D.
The master RE verifies disk space on both REs, unsupported configurations, and unsupported
PICs.

E.
Any unsupported PICs will cause the ISSU process to fail with “Error: incompatible hardware
detected.”

Explanation: