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Data communication as a need developed in the 1960s with the interconnection of peripheral devices to mainframe computers. Within the immediate vicinity of the mainframe computer the interconnection would be via a high-speed interconnection network, or Local Area Network. Communication to remote terminals was originally by text.
The communication between computers introduced a new discipline of communication protocols. A human being at one end of the connection can apply reasoning to correct most errors; however a computer is unable to apply reasoning. The protocols have to be capable of precise and unambiguous interpretation by a computer.
To separate the design of protocols they are separated into layers and formed into a layered architecture. The Open Systems Interconnection (OSI) is the model for a layered architecture, although most protocol architectures adhere to the principles of OSI rather then the strict definition of the layers.
Output Devices: Each output unit of computer system transmits information from the CPU and converts the electrical pulses to an appropriate output form. A printer, for example
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Write an ARM subroutine which will extract a substring from a string. You will need to use the library routine malloc to allocate memory for the new string. The subroutine signatu
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This is a C file. 1. The program starts by printing your name with an end sign ">". For example, "NAME >"; 2. Then, you can type in a string. If the string is not "vi xxx", you pri
Language of Digital Computers: Digital computers are electronic devices which operate on two valued logic (On and OFF). The ability of a transistor to act as a switch is the k
create a simple Visual Basic project
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