Which technology can be employed to automatically detect a WAN primary link failure and failover to the secondary link?

ccnp-dump
ccnp-route-dump
ccnp-route

#1

Refer to the exhibit. Which technology can be employed to automatically detect a WAN primary link failure and failover to the secondary link?

A. HSRP
B. VRRP
C. IP SLA
D. multicast

Correct Answer: C