Advantages And Disadvantages Of Serial And Parallel Data Transmission
Mar 4, 2018 - Advantages And Disadvantages Of Serial And Parallel Data Transmission. Data within a computer system is transmitted via parallel mode on. Sep 4, 2018 - What are the advantages and disadvantages of parallel and serial. Parallel Data transmission Advantages Disadvantages. What are the.
Definition Data Transmission: When we enter data into the via keyboard, each keyed element is encoded by the electronics within the keyboard into an equivalent binary coded pattern, using one of the standard coding schemes that are used for the interchange of. To represent all characters of the keyboard, a unique pattern of 7 or 8 bits in size is used. The use of 7 bits means that 128 different elements can be represented, while 8 bits can represent 256 elements. A similar procedure is followed at the receiver that decodes every received binary pattern into the corresponding character. The most widely used codes that have been adopted for this function are the Extended Binary Coded Decimal (EBCDIC) and the American Standard Code for Information Interchange codes (ASCII). Both coding schemes cater to all the normal alphabetic, numeric, and punctuation characters, collectively referred to as printable characters and a range of additional control characters, known as non-printable characters. Data transmission refers to the movement of data in form of bits between two or more digital devices.
This transfer of data takes place via some form of transmission media (for example, coaxial cable, fiber optics etc.) Types of Data Transmission Parallel transmission Defination: Within a computing or communication device, the distances between different subunits are too short. Thus, it is normal practice to transfer data between subunits using a separate wire to carry each bit of data. There are multiple wires connecting each sub-unit and data is exchanged using a parallel transfer mode. This mode of operation results in minimal delays in transferring each word. • In parallel transmission, all the bits of data are transmitted simultaneously on separate communication lines. • In order to transmit n bits, n wires or lines are used.
Thus each bit has its own line. • All n bits of one group are transmitted with each clock pulse from one device to another i.e. Multiple bits are sent with each clock pulse. • Parallel transmission is used for short distance communication. • As shown in the fig, eight separate wires are used to transmit 8 bit data from sender to receiver.
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Advantage of parallel transmission It is speedy way of transmitting data as multiple bits are transmitted simultaneously with a single clock pulse. Disadvantage of parallel transmission It is costly method of data transmission as it requires n lines to transmit n bits at the same time.