Refer to the exhibit. A network engineer is troubleshooting a DMVPN setup between the hub and the spoke.
The engineer executes the command show crypto isakmp sa and observes the output that is displayed. What is the problem?
A. That ISAKMP is not enabled
B. That ISAKMP is using default settings
C. An incompatible IP sec transform set
D. An incompatible ISAKMP policy
Correct Answer: B