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Answers. Best Answer: communication network means the fundamental models of communication, which is changed from time to time. How our ancesters use methods for communication and what we are doing nowadays for communication. If we do a research then we can see the changes of the mediums for communications. It is based on somany things because communication differs from place to palce, stage to stage etc. Like how effectively we are communicating with each other front to front that efficiency won't work if we both communicate from a long distance or from water.
In telecommunication, a communications system is a collection of individual communications networks, transmission systems, relay stations, tributary stations, and data terminal equipment (DTE) usually capable of interconnection and interoperation to form an integrated whole.ower line communication systems operate by impressing a modulated carrier signal on power wires. Different types of powerline communications use different frequency bands, depending on the signal transmission characteristics of the power wiring used.