Refer to the exhibit. An engineer configured IP SLA on R1 to avoid the ISP link flapping problem. but it is not working as designed IP SLA should wait 30 seconds before switching traffic to a secondary connection and then revert to the primary link after waning 20 seconds, when the primary link is available and stabilized. Which configuration resolves the issue?
A.
R1(config)#ip sla 700
R1(config-ip-sla)#delay down 30 up 20
B.
R1(config)#ip sla 700
R1(config-ip-sla)#delay down 20 up 30
C.
R1(config)#track 700 ip sla 700
R1(config-track)#delay down 30 up 20
D.
R1(config)#track 700 ip sla 700
R1(config-track)#delay down 20 up 30
Correct Answer: C
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