Which First Hop Redundancy protocol cannot be configured for interface tracking?

A.
HSRP

B.
GLBP

C.
VRRP

D.
SLB

E.
RPR

F.
RPR+

Explanation:
Although VRRP cannot track interfaces as the RFC does not specify any mechanism to do so,
object tracking can be used instead. VRRP is the best answer.