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
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