Chapter 3 – Rules of Communication
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For communication to occur, devices must know “how” to communicate.
Three elements of all communication methods
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Source or Sender
o Message sources are people, or electronic devices that need to send a message to other
individuals or devices.
Destination or receiver
o Receives the message and interprets it.
Channel
o Consists of media that provides the pathway over which the message travels from
source to destination.
Communication begins with a message or information, that must be sent from a source to a destination.
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Governed by rules called protocols
Like a telephone call would not have a same protocol for using another medium, such as sending
letter.
Protocols must account for following requirements
o An identified sender and receiver
o Common language and grammar
o Speed and timing of delivery
o Confirmation or acknowledgement requirements
Common protocols include:
o Message encoding
o Message formatting and encapsulation
o Message size
o Message timing
o Message delivery options
First Rule:
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Encoding
o Process of converting information into another, acceptable form for transmission.
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Decoding reverses this process to interpret the information.
Second Rule:
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Message Formatting and Encapsulations
o When a message is sent from source to destination, it must use a specific format or
structure.
o Letter writing is the most common forms of written human communication, and
contains the following elements:
 An identifier of the recipient
 Salutation or greeting
 Message content
 Closing phrase
 Identifier of the sender
Third Rule:
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Communication Size