CHAPTER 3B - CHAPTER 3B COMPUTER HARDWARE AND SOFTWARE...

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CHAPTER 3B COMPUTER HARDWARE AND SOFTWARE Computer hardware is the physical component attached to your PC. It can not be modified or changed regularly. It is fixed to its place and requires complex examination in order to be rectified or repaired. Computer hardware is entrenched inside a steel covering therefore it is not visible to the end users. Computer hardware is of many different types and models. There are unlimited manufacturers of the computer hardware today. Types of Hardware Devices Hardware can be both found in input and output devices Power supply(S.M.P.S)Switch Mode Power Supply A case that holds a transformer, voltage control, and (usually) a cooling fan, and supplies power to the rest of the computer such as For Motherboard,CD-rom,R/w,Floppy drive etc Storage controllers Controllers for hard disk, CD-ROM and other drives like internal Zip and Jaz conventionally for a PC are IDE/ATA; the controllers sit directly on the motherboard (on-board) or on expansion cards, such as a Disk array controller. IDE is usually integrated, unlike SCSI which is found in most servers. The floppy drive interface is a legacy MFM interface which is now slowly disappearing. All these interfaces are gradually being phased out to be replaced by SATA and SAS. Video display controller It Produces the output for the computer display. This will either be built into the motherboard or attached in its own separate slot (PCI, PCI-E or AGP), in the form of a Graphics Card. Hard disk It is use for medium-term storage of data. Solid state drive - a device emulating a hard disk, but containing no moving parts. Disk array controller - a device to manage several hard disks, to achieve performance or reliability improvement. Sound card It Enables the computer to output sound to audio devices, as well as accept input from a microphone. Most modern computers have sound cards built-in to the motherboard, though it is common for a user to install a separate sound card as an upgrade. NetworkingConnects the computer to the Internet and/or other computers. Modem
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It is use for dial-up connections Network card - for DSL/Cable internet, and/or connecting to other computers. Direct Cable Connection - Use of a null modem, connecting two computers together using their serial ports or a Laplink Cable, connecting two computers together with their parallel ports. Other peripheralsIn addition, hardware can include external components of a computer system. The following are either standard or very common.
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