Question: With roll - call polling media access control: All devices send data at the same time. The controller works consecutively through a list of devices.

With roll-call polling media access control:
All devices send data at the same time.
The controller works consecutively through a list of devices.
One device starts the pchis and passes it to the next device on the circuit.
Devices wait until the circuit is free before they send data.
With roll - call polling media access control:

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