LINEAR- In linear model, communication is considered one way process where
sender is the only one who sends message and receiver doesn't give feedback
or response. The message signal is encoded and transmitted through channel in
presence of noise. The sender is more prominent in linear model of
communication.
Linear model was founded by Shannon and Weaver which was later adapted by
David Berlo into his own model known as SMCR (Source, Message, Channel,
Receiver) Model of Communication.
   Sender is the person who sends a message after encoding.
   Encoding is the process of converting the message into codes compatible with
    the channel and understandable for the receiver.
   Decoding is the process of changing the encoded message into
    understandable language by the receiver.
   Message is the information sent by the sender to the receiver.
   Channel is the medium through which the message is sent.
   Receiver is the person who gets the message after decoding.
   Noise is the disruptions that are caused in the communication process in
    channel or in understandability of the message.
INTERACTIVE- Interactive model (also known as convergence model) deals with
exchange of ideas and messages taking place both ways from sender to receiver
and vice-versa. The communication process take place between humans or
machines in both verbal or non-verbal way. This is a relatively new model of
communication for new technologies like web.
   Encoder-Source-Decoder: The person who originates a message is the source.
    The encoder and decoder are the same person/source. The second source is
    also encoder as well as decoder. The source acts as an encoder while
    sending the message and as decoder while receiving the message. The
    second source decodes the message, then originates another message,
    encodes it and sends it to the first source. The source is known to be encoder
    and decoder during the act of encoding and decoding.
   Message: Message is the information sent during the interaction.
   Feedback: The decoder forms a second message after receiving the first
    which is known as feedback.
   Field of Experience: Field of experience is the experience and knowledge that
    the source possess which affects the message formation and interpretation.
    For example, the source's culture, social behavior, etc.
TRANSACTIONAL- Transactional model of communication is the exchange of
messages between sender and receiver where each take turns to send or
receive messages. Here, both "sender" and "receiver" are known as
"communicators" and their role reverses each time in the communication
process as both processes of sending and receiving occurs at the same time.
The communicators can be humans or machines but humans are taken as
communicators in this article to analyze general communication between
humans. The model is mostly used for interpersonal communicationand is also
called circular model of communication.