Which media access method requires that an end device send a notification across the media before sending data?

Which media access method requires that an end device send a notification across the media before sending data?

• CSMA/CA​
• CSMA/CD​
• deterministic
• token passing

Explanation: Using CSMA/CA as the media access control method, a device will examine the network media. If there is no carrier, the device sends a notification and, if no other device uses the media, it begins to send its data. This method differs from CSMA/CD, where a device will send data once it senses that the media is free, without sending a notification.

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