HSRP. Known as Hot Stanclby Router Protocol, is a Cisco proprietarv redundancy protocol . As an experienced network administrator, you are required to configure HSRP on a XYZ network. Which TWO of the following wii be available and shared between the routers configured with HSRP? (Choose two.)

A.
a shared single interface

B.
the ability to track serial interfaces

C.
UDP-based hello packets

D.
the impact of flapping links if timers are too low