Types Of Communication In Communication

This module introduces the different types of communication modes used in data communication systems. The communication between components of interconnected systems are typically classified into connection-oriented and connectionless services. Connection-oriented services resemble a telephone system, where one party makes a call, while waiting for the other to answer, the person at the other end converse and finally terminate the call. In contrast to connection-oriented services, connectionless services resemble the communication such as using the postal system. Someone prepares an item, places it in an envelope, which contains the full address of the intended recipient, which is then transmitted over a connectionless medium. Switching in computer

A device that performs the process of multiplexing is called a multiplexer and the reverse process is called a demultiplexer. Modulation is the process through which image, text, audio or video information is added to a carrier signal to be transmitted over a communication medium. Routing is the process of forwarding packets across a network from one host to another and is performed by using dedicated routers and routing algorithms. A computer network is a logic interconnection between two or more computers such that the communication with each other is achieved efficiently. Simplex, half-duplex and full-duplex are the three most prominent types of communication modes. The communication modes are sometimes referred to as transmission modes and further classified into serial and parallel transmission. A switch in computer networks is a device that channels incoming data from any of the multiple ports to a specific output port that takes towards the destination. Switching is typically classified into packet, circuit and message

Generally, it is imperative to know the use of the simplex, half-duplex and full-duplex mode of communication. List the applications that fall under the abovementioned modes of communication.In parallel transmission, all the bits of a data are transmitted simultaneously on separate communication mediums as shown in figure 3.1.6. The idea behind the parallel transmission is sending 8 bits of data at exactly the same time over 8 separate wires. Besides the 8 data lines, there will be a one or more control lines that will be used either by the sender or receiver during transmission. The main advantage of using parallel transmission is that the speed of data transmission is faster and best suited for underlying interfaces such as computers that use parallel circuits internally.In serial communication, bits of a data are transmitted serially one after the other. The Least Significant Bit (LSB) is transmitted first. Only one interconnecting circuit is enough for the data transmission between two devices as shown in the figure 3.1.7. Serial communication is best suited for long distance communication. Most of communication systems use serial the transmission mode since it is cost effective to extend single-wire systems over a long distance.Serial data transmission may be asynchronous or synchronous. In synchronous data transmission, start and stop bits for timing on each character is not required and thus it is