GENIUS KNOWLEDGE

Information Network. 1.LAN--- THE LAN (Local Area Network) is a system whereby individual PCs are connected together within a company or organization. 2.WAN--- THE WAN (Wide Area Network) as the name implies allows you to connect to other computers over a wider area. Uses of Network If ten people are working together within an office it makes sense for them all to be connected. • In this way the office can have a single printer and all ten people can print to it.  • In a similar way other devices such as modems or scanners can be shared.  • Even more useful is the ability to share  information when connected to a network. Computer Accessories. 1.Modem Short for “MODulate/DEModulate”. The modem sends information from your computer across the telephone system. The modem at the other end of the phone line, converts the signal back into a format that can be used by the receiving computer. Uses ...

Hardware Components Memory  ROM – Read Only Memory Read Only Memory (ROM) as the name suggests is a special type of memory chip that holds software that can be read but not written to. A good example is the ROM-BIOS chip, which contains read- only software.  Often network cards and video cards also contain ROM clips. How Computer Memory Is Measured Bit All computers work on a binary numbering system, i.e. they process data in one's or zero's. This 1 or 0 level of storage is called a bit.  Byte A byte consists of eight bits. Kilobyte A kilobyte (KB) consists of 1024 bytes. Megabyte A megabyte (MB) consists of 1024 kilobytes. Gigabyte A gigabyte (GB) consists of 1024 megabytes. Microprocessors -- "The brain of the computer“ - PCs primarily use microprocessors (sometimes called the chip). The older Intel versions include the 386, 486 and now the Pentium line. The CPU (Central Processing Unit) is normally an Intel Pentium (or equival...