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There are basically two types of communication in human being. The first type is One to One (type 1) and the second type is One to Many (type 2).

In One to One communication, one party (sender) delivers message to another party (receiver), in which the message is targeted directly to the receiver who is well identified.
Example: One person talks to another person; Send a letter or a note to someone; Call someone on the phone.

In One to Many communication, one party (sender) delivers message to many parties (receivers), in which the message is targeted to those receivers who have interested in the message.
Example: One speaker make a speech to a group of audiences; TV and Radio broadcasting; A lot of this type of communication in our daily life - advertising poster, directory, notice board, alert sign and even a street sign.

Internet is a modern approach to address type 1 communication using telecommunication technology of signalling protocol. The receiver is identified with an unique IP address. This allows message to be delivered to the receiver anywhere, anytime in a network.

Com2 is a new approach to address the type 2 communication.
Message is broadcasted with information of sender (senderID) and content (contentID) to all the receivers. This allows receivers to filter the message based on the information of sender ID and content ID.