Examine the following output from the FortiLink real-time debug.
Based on the output, what is the status of the communication between FortiGate and FortiSwitch?
A . FortiGate is unable to authorize the FortiSwitch.
B . FortiGate is unable to establish FortiLink tunnel to manage the FortiSwitch.
C . FortiGate is unable to located a previously managed FortiSwitch.
D . The FortiLink heartbeat is up.
Answer: D