ICT Glossary – Some Important Terms Related To ICT


1. FDDI (Fiber Distributed Data Interface)

It is high performance fiber optic token ring network. IT is a standard for data transmission  in a local area network. It is used with high bandwidth. FDDI provides a 100 Mbit/s optical standard for data transmission in local area network that can extend in range up to 200 kilometers (120 mi)FDDI is implemented without hubs, although you can use devices called concentrator to perform a similar function.

2. FAX

Short for Facsimile and sometimes called telecopying  or telefax. It  is the telephonic transmission of scanned printed material (both text and images), normally to a telephone number connected to a printer or other output device. The original document is scanned with a fax machine (or a telecopier), which processes the contents (text or images) as a single fixed graphic image, converting it into a bitmap, and then transmitting it through the telephone system in the form of audio-frequency tones. The receiving fax machine interprets the tones and reconstructs the image, printing a paper copy.

3. Firewall

Software  that  usually  runs  on  the  proxy  server of an organization,   and controls  the flow of incoming  and outgoing  messages    from    within    an   organization     for providing  better  security  to the organization.Firewalls can be implemented as both hardware and software, or a combination of both. Network firewalls are frequently used to prevent unauthorized Internet users from accessing private networks connected to the Internet, especially intranets. All messages entering or leaving the intranet pass through the firewall, which examines each message and blocks those that do not meet the specified security criteria.

4. Firmware

Software  that  is substituted   for  hardware  and stored  in read-only  memory  (ROM).Firmware is a software program or set of instructions programmed on a hardware device. It provides the necessary instructions for how the device communicates with the other computer hardware.

5. FDM (Frequency Division   Multiplexing)

A method  to concurrently    transmit   data   between   several   transmitters and   receivers    over    a   single   transmission    medium.    It divides  the available  bandwidth of a physical  medium  into smaller,  disjoint,  logical  bandwidths,   and  uses  each of the component   bandwidth   as  a  separate   communication    line (channel).

6. Floppy Disk

A magnetic disk which is used to store data. They come in 3.5 and 5.25 inch diameter variants. Floppy disks are often used to transfer files from one PC to another or to Backup important files.



1. GUI (Graphical user interface) operating system

Microsoft introduced OS/2 operating systems. Windows operating system has a very user friendly interface. Windows 3.1 was the first popular version of Windows operating system. Later on Windows 95, Windows 98, Windows 2000, Windows XP, Windows NT, Windows Vista , Windows 7 and Windows 8 came into the market. Mouse is used for clicks and selecting various items in a GUI.

2. GIGO (Garbage-In-Garbage-Out)

It  Refers  to computer errors   caused   due  to  incorrect   input  data,  or  unreliable programs.

3. Gateway

  • A computer that is connected  to the Internet by  using  a dedicated   (leased)   telephone   line  and  is used to provide   Internet  connectivity   to other  computers   via  it.
  • An internetworking tool  that  is used  to  interconnect

4. Gray scales

Number   of  shades   of  a  color  that  can  be presented   on  a monochrome   (black  and  white)  monitor’s screen,  or on a monochrome   printer’s  output.


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ICT Glossary – Some Important Terms Related To ICT

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