Correct Answer: B,E
HSRP (Hot Standby Router Protocol) is a Cisco proprietary redundancy protocol for establishing a fault-tolerant default gateway. The protocol establishes a framework between network routers to achieve default gateway failover if the primary gateway becomes inaccessible.
* B: If Fa0/0 is shut down, the HSRP priority on R2 becomes 80. This is because interfaces going down can trigger a priority decrement in HSRP, which is often configured with the standby <group number> track <interface> <decrement value> command.
* E: R2 is using the default HSRP hello and hold timers. The default hello time is 3 seconds, and the hold time is 10 seconds. These values can be seen in the output of the show standby command if they are not explicitly configured to different values.