Techinfo

Central Processing Unit A central processing unit (CPU) is the  electronic circuitry  within a  computer  that carries out the  instructions  of a  computer program  by performing the basic arithmetic, logical, control and  input/output  (I/O) operations specified by the instructions. The main function of the CPU is processing instructions given to the computer. This is why the CPU is known as the "brain" of the PC. Every operation that is carried out, including key strokes, opening and closing programs, and saving files, is carried out by the CPU.

TCP/IP Overview of TCP/IP reference model TCP/IP that is Transmission Control Protocol and Internet Protocol was developed by Department of Defence's Project Research Agency (ARPA, later DARPA) as a part of a research project of network interconnection to connect remote machines. The features that stood out during the research, which led to making the TCP/IP reference model were: Support for a flexible architecture. Adding more machines to a network was easy. The network was robust, and connections remained intact untill the source and destination machines were functioning. The overall idea was to allow one application on one computer to talk to(send data packets) another application running on different computer.

Computer Generations