3.1 the sender (Sender) is a device that is used to send the message (Message) as the source of the information is responsible for the preparation of communications data, such as a tv speakers, etc.3.2 receiver (Receiver) is a communication endpoint is responsible for the information submitted, such as to. San yan tuner.3.3 medium (Medium), or the middle of a communication path to the data from the source to the destination. Transmission media twisted pair wire helix may be the coaxial cable, fiber optic cable, or the transmission by air waves.3.4 information message (Message) is an electronic signal that is sent through a communication system, which may be called information such as text, video, etc.3.5 Protocol (the Protocol) is the method or the rules that are used to communicate information to the recipient and the sender can understand each other or talk to each other and understand both the recipient and the sender has agreed to before. In computer protocols are part of the software that enables operations such as TCP/IP ICMP SDLC, HDLC.
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