The key elements of the communication model are as follows

The key elements of the communication model are as follows:

·         Source:

This device generates the data to the transmitted; examples are telephones and personal computers.

·         Transmitter:

usually, the data generated by a source system are not transmit directly in the form in which they were generated. Rather, a transmitter transforms and encodes the information in such a way as to produce electromagnetic signal that can transmitted across some sort some sort ol transmission system. For example, a modem takes a digital bit stream from an attached device such as a personal computer and transforms that hit stream into an analog signal that can he handled by the telephone network.

·         Transmission system:

This can be a single transmission line or a complex work connecting source and destination.

·         Receiver:

 The receiver accepts the signal from the transmission system and converts it into a form that can he handled by the destination device. For exampIe, a modem will accept an analog signal coming from a network or through transmission line and convert it into a digital hit stream.

·         Destination:

Takes the incoming data from the receiver

   Another example is the exchange of voice signals between two telephones over the

   same network.