Communication and Network

Modulation

Modulation is the process of varying one or more properties of a high-frequency periodic waveform, called the carrier signal, with a modulating signal which typically contains information to be transmitted.

TCP/IP

 

TCP/IP is also known as Transmission Control Protocol/Internet Protocol. It is the basic communication language or protocol of the Internet. It can also be used as a communications protocol in a private network .

Node

Node is a connection point in communication network.In network theory or graph theory, the term node refers to a point in a network topology at which lines intersect or branch.

Client

A client is an application or system that accesses a remote service on another computer system,known as a server, by way of a network.

Server

In computing, the term server is used to refer to a computer program running to serve the needs or requests of other programs  which may or may not be running on the same computer.In computer networking, a server is a program that operates as a socket listener.

Network Operating Systems

A networking operating system is also known as NOS. It is the software that runs on a server and enables the server to manage data, users, groups, security, applications, and other networking functions. The network operating system is designed to allow shared file and printer access among multiple computers in a network, typically a local area network.

Network Administrator

A network administrator is a person responsible for the maintenance of computer hardware and software that comprises a computer network. This normally includes deploying, configuring, maintaining and monitoring active network equipment.

Demodulation

Demodulation  is the act of extracting the original information-bearing signal from a modulated carrier wave. A demolutor is an electronic circuitthat is used to recover the information content from the modulated carrier wave.

Bandwidth

In computer networks, bandwidth is often used as a synonym for data transfer rate - the amount of data that can be carried from one point to another in a given time period.In electronic communication, bandwidth is the width of the range of frequencies that an electronic signal uses on a given transmission medium.

Secondary Storage

Disk Caching

A disk cache is a mechanism for improving the time it takes to read from or write to a hard disk.  A disk cache can also be a specified portion of random access memory . It holds data that has recently been read and, in some cases, adjacent data areas that are likely to be accessed next. Write caching is also provided with some disk caches.

File Compression

File compression is commonly used when sending a file from one computer to another over a connection that has limited bandwidth. The compression basically makes the file smaller and, therefore, the sending of the file is faster.

File Decompression

 

File decompression is the reverse--the decoding of compressed data to restore the original data

Internet Hard Drive

The Internet hard drive will allow you to deposit your computer files into a remote hard drive,  then access those very same files from any other computer.

Optical Disk Drive

It is a disk drive that uses laser light or electromagnetic waves near the light spectrum as part of the process of reading or writing data to or from optical discs.

Solid - State Storage

It is a data storage device that uses solid-state memory to store persistent data with the intention of providing access in the same manner of a traditional block i/o hard disk drive.

Input And Output

Ergonomic Keyboard

An ergonomic keyboard is a computer keyboard that designed with ergonimic considerations to minimize muscle strain and a host of related problems. It typically such keyboards are constructed in a V shape, to allow right and left hands to type at a slight angle more natural to the human form.

Inkjet Printer

Inkjet printer is a type of computer printer that creates a digital image by propelling droplets of ink onto paper. Inkjet printers are the most commonly used type of printer and range from small inexpensive consumer models to very large professional machines, that can cost up to thousands of dollars.

Laser Printer

Laser printer is a common type of computer printer that rapidly produces high quality text and graphics on plain paper.

Magnetic - ink character recognition

Magnetic ink character recognition is also known as MICR. It is a character recognition technology used primarily by the banking industry to facilitate the processing of cheques.

Optical - character recognition

Optical character recognition is also known as OCR. It is the mechanical or electronic translation of scanned images of handwritten, typewritten or printed text into machine-encoded text. It is widely used to convert books and documents into electronic files, to computerize a record-keeping system in an office, or to publish the text on a website.

Optical - mark recognition



Optical mark recognition is also known as OMR. It is the process of capturing human-marked data from document forms such as surveys and tests.

System Unit

RAM

 RAM is a memory device in which information can be accessed in any order that place in a computer where the operating system, application programs, and data in current use are kept so that they can be reached by the computer's processor. RAM also called Random Access Memory.

Cache Memory

Cache memory is the small amount of memory that is normally less than 1MB that resides on the CPU.The CPU cache is a cache used by the central processing unit for a computer to reduce the average time to access memory. 

ROM

ROM also known as Read Only Memory. ROM is computer memory that can permanently store data and applications within it. ROM has the programming that allows your computer to be regenerated each time you turn it on.

Flash Memory

Flash memory is a type of constantly-powered nonvolatile memory. It can be erased and reprogrammed in units of memory called blocks. Flash memory also called flash RAM sometimes.

Graphic Card

Graphic card is a device that installed in the computer that consists of a graphics processing unit designed to help process and display 3D graphics.

Sound Card

Sound card is also called audio card. It is a device that enable the computer to input, process, and deliver sound. The four main functions are, as a synthesizer, as a MIDI interface, analog-to-digital conversion, and digital-to-analog conversion . The three methods of sound synthesis are through frequency modulation.

Network Interface Card

A network interface card (NIC) is a computer circuit board or card that is installed in a computer so that it can be connected to a network. Network interface cards provide a dedicated, full-time connection to a network.

Plug And Play

Plug and Play is a capability developed by Microsoft that gives users the ability to plug a device into a computer and have the computer recognize that the device is there. Microsoft made Plug and Play a selling point for its Windows operating systems.

Serial Port

Serial port is a socket on a computer used to connect a modem, data acquisition terminal or other device via a serial interface. Serial ports provide slow speeds and have been superseded by USB and other faster interfaces for peripheral connections to desktop computers.

Parallel Port









Parallel port is a type of interface found on computers for connecting various peripherals. In computing, a parallel port is a parallel communication physical interface. It is also known as a printer port or centronics port.

Universal Serial Bus Port

Universal serial bus port is also known as USB port. It is an interface on the computer that enables you to connect a Universal Serial Bus (USB) device. USB ports support a plug that is approximately 7 mm x 1 mm.

FireWire Port

FireWire port is a high-speed serial bus that was developed by Apple, Texas Instruments and others via the IEEE. Standardized as the IEEE 1394 High Performance Serial Bus (HPSB), FireWire supports 63 devices, real-time data transfer, hot swapping and simultaneous multiple speeds. It is widely used to download video from digital camcorders to the computer and is also used in other A/V applications.

Ethernet Port

Ethernet port is an opening on computer network equipment that Ethernet cables plug into. These ports are alternatively called jacks or sockets. Ethernet ports accept cables with RJ-45 connectors

High Definition Multimedia Interface

 

High definition multimedia interface is also known as HDMI. It is a compact audio/video interface for transmitting uncompressed digital data. It is a digital alternative to consumer analog standards.