Five components make up the datacom system, and they include a Message, Sender, Receiver, Medium of Transmission, and Rules (Protocol).
The Message. The message refers to the information, or data, that is being communicated. This can take many forms, like an audio recording, an image, video, etc. The Sender. The sender refers to the device that is used to send the message, and can be a computer, cellphone, laptop, camera, etc. The Receiver. The device that receives the message from the sender, and as such can be similar devices. Medium of Transmission. The medium refers to the method connecting the sender and the receiver. The connection can be wired or wireless. Wired methods include twisted cable or fiber optic cables. Wireless methods can be radio, microwaves, Wi-Fi, etc. Rules (Protocol). The Protocol has to be created and established for both connected devices to be either the sender or receiver, and it is created by the designers of the communication system.