Open system interconnection reference model

Open system interconnection reference modelThe open system interconnection (OSI) reference model describes how information from a software application in one computer moves through a network medium to a software application in another computer.the osi reference model is a conceptual model composed of seven layers,each specifying particular network functions.the model was developed by the interneational organization fo rstandardization...

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What is the world wide web and what makes it work?

What is the world wide web and what makes it work?The www incorporates all of the internet services abouve and much more.you can retrieve documents,view images,animation,and video,listen ot sound files,speak and hear vouce,and view programs that run on practically any software to do these things.when you log onto the internet using netscape or microsoft's internet explorer or some other browser,you are viewing documents on the world wide...

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What is Internet

What is the internet?Tha internet is a network of networks, linking computers to computers sharing the tcp/ip protocol.each runs software to provide or "serve" infromation and /or to access and view information.the internet is the transport vehicle of r the information stored in files or documents on another computer.it can be compared to and international communications utility servicing computers.it is sometimes compared ot a giant international...

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Storage & Memory

Storage & memoryDisksThe hard disk can store very large amounts of data (measured in megabytes), commonly,the smallest hard disks contain 1 gigabyte of information.a gigabyte is equivalent to 1000 megabytes.Information,data and programs stored on teh hard disk are non-volatile(i.e. The information stays there even when you switch off the computer).Remember that you can also use floppy disks, also called diskettes.there are very slow...

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Basic units of data storage

Basic units of data storageBitAll 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.often hardware is specified as a 32 bit computer which means that the hardware can process 32 bits at a time.Software is also described as either 16 bit or 32 bit software.A byte consists of eight bitMegabyteA megabyte (mb) consists of approximately one million bytes.Files.Data...

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Difference between operating system and computer programs

Difference between operating system and computer programs,Operating systemThe operating system is a special type of program that loads automatically when you start your computer.the operating system allow to use the advanced feature of a modern computer without having to learning  all the details of how the hardware works.there are a number of different types of operating system in common use.the ibm pc (personal computer) was introduced...

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INPUT & OUTPUT DEVICES

Input and output devicesWhat are input devices?Input decives allow you to input information to the computer and include things such as the keyboard,mouse,microphone,touchpad and joystick etc.What are output devices?Output devices allow you to output information from the computer and include the printer,speaker and the monito...

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HARDWARE vs SOFTWARE

Hardware Vs SoftwareHardwareThe Terms Hardware Refers To The Physical Components Of Your Computer Such As The System Unit,Mouse ,Keyboard,Monitor,Printer,Ram,Hard Disk,Cd Rom,Floppy, Cds, Etc.SoftwareThe Sftware Are The Instructions That Make The Computer Work.For Instance How You Type In Words Via The Keyboard , The Software Is Responsible For Displaying The Correct Letters,In The Correct Place On The Screen . Software Is Held Either...

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Basic Concepts of I.T.

The Concept of the "Information Society"The concept of the information society refers to the fact that it is now very easy to link computers together and access information stored on other computers.The internet is a good example . By connecting to the internet you again access to millions of other computers that are connected around the workd . You can communicate via email with anyone on this planet (assuming they also have an email...

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