R0 is a Juniper Networks MX router with dual Routing Engines. You must load new software on R0 while ensuring no control plane disruption and minimal data loss.
Which three features meet the requirement? (Choose three.)
A . graceful restart
B . NSR
C . graceful Routing-Engine switchover (GRES)
D . unified ISSU
E . BFD
Answer: B,C,D