A network administrator is in charge of multiple IPsec VPN headend devices that service thousands ofremote
connectivity, point-to-point, IPsec/GRE tunnels. During a recent power outage, in which it was foundthat a
backup power supply in one of those headend devices was faulty, one of the headend routers suffered a
complete shutdown event. When the router was successfully recovered, remote users found intermittent
connectivity issues that went away after several hours. Network operations staff accessed the headend
devices and found that the recently recovered unit was near 100% CPU for a long period of time. How would
you redesign the network VPN headend devices to prevent this from happening again in the future?
A. Move the tunnels more evenly across the headend devices.
B. Implement Call Admission Control.
C. Use the scheduler allocate command to curb CPU usage.
D. Change the tunnels to DMVPN.

Answer: B

Explanation:

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