A network administrator is a person who is responsible to maintain to hardware and software that comprise a network. It usually a technical or network staff in an organization but rarely involved with direct user support.
Sunday, 26 June 2011
Network Operating System is the software that runs on a server and enables the server to manage data, users, groups, security, applications, and other networking functions. It allows to share files and printer access among multiple computers in a network, generally a local area network(LAN), or private network or to another network.
Saturday, 25 June 2011
Modulatioon is the process of conveying a message signal. It used to transform a baseband message signal into passband signal. A device that performs modulation is known as a modulator, and a device that performs the inverse operation of modulation is known as a demodulator (sometimes detector or demod). A device that can do both operations is a modem (modulator–demodulator).
Friday, 24 June 2011
Monday, 20 June 2011
Optical disk drives hold over 50 gigabytes of data. There are three types : Compact Disc (CD), Digital Versatile Disc (DVD), and Hi-Def Disc. Compact Disc is optical format which memory from 650MB to 1GB capacity with rotation speeds vary. Digital Versatile Disc known as Digital Video Disc (DVD) which similar to CDs, but can store more data from 4.7GB to 17GB on the single disc. Hi-Def Disc is the next generation of optical disc which far greater capacity than DVDs.
Disk caching improves hard disk performance by anticipating data needs. In modern disk drives, it includes a small amount of internal cache. Its function is similar to cache memory. When a program needs to access new data, the operating system first checks to see if the data is in the cache before reading it from the disk.
Sunday, 19 June 2011
Optical-character recognition (OCR) is the mechanical or electronic translation of scanned images of handwritten, typewritten or printed text into machine-encoded text. It is commonly 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.
Wednesday, 15 June 2011
Saturday, 28 May 2011
A USB port is a standard cable connection interface on personal computers and consumer electronics. USB ports allow stand-alone electronic devices to be connected via cables to a computer (or to each other). USB only has limited GB to save your own data, and it is small so you can bring it everywhere.
Friday, 27 May 2011
Plug and Play (PnP) technology provides a combination of software and hardware support that enables the Windows operating system to detect and configure hardware with little or no user involvement. Plug and Play makes it easier to add and configure hardware on a computer, it supports wide range of devices.
A sound card also known as an audio card. It is an internal computer expansion card that facilitates the input and output of audio signals to and from a computer under control of computer programs. It also also applied to external audio interfaces that use software to generate sound. Typical uses of sound cards include providing the audio component for multimedia applications such as music composition, editing video or audio, presentation, education and entertainment (games) and video projection.
Thursday, 26 May 2011
Flash memory (Flash RAM) offers a combination of the features of ROM and RAM. Flash memory is non-volatile, meaning no power is needed to maintain the information stored in the chip. Like RAM, it can be updated to store new information. Like ROM, it doesn't lose that information when power to the system is switched off. Flash memory used in wide range of application.
Wednesday, 25 May 2011
RAM stands for Random Access Memory. It holds the program (sequence of instuctions) and data that the CPU is presently processing. RAM is much faster to read from and write to than the other kinds of storage in a computer, the hard disk, floppy disk, and CD-ROM. When you turn on your computer, your operating system and other files will automatically load into RAM again, normally from your hard disk. It is wiser to save your document every few minutes.
Monday, 2 May 2011
In physics, a vector is a representation of both a quantity and a direction at the same time. In vector images, the file that results from a graphic artist's work is created and saved as a sequence of vector statements. instead of containing a bit in the file for each bit of a line drawing, a vector graphic file describes a series of points to be connected. One result is a much smaller file.
Image editor is a program that provided variety of features from editing bit-mapped images. The difference between image editors and paint programs is not always clear-cut, but in general image editors are specialized for modifying bit-mapped images, such as scanned photographs, whereas paint programs are specialized for creating images.
HTML editor is a application software for creating web pages. The HTML markup of web pages can be written with any text editor, it offers convenience and added functionally. HTML software is easy to use since it has a feature that is known as WYSIWYG. When you design web pages you want to use editor features that are simple to understand.
Desktop Publishing Program is a tool for graphic designers and non-designers to create visual communications for professional or desktop printing as well as for online or on-screen electronic publishing. It also resulted in a wider range of low-cost, easy-to-use software that didn't require traditional design and prepress skills to understand and use.
Radio editing software can help preparing and editing music for broadcast. This software also for cross fading, mixing or other DJ applications. Most products can perform format conversions, so you can take a clip from the Internet or an MP3 file and convert it to the format your station uses for broadcasting.
Utility suites is a kind of system sofware to help analyze, configure, optimize and maintain the computer. It allows users to do things like creating text documents, playing games, listening to music or surfing the web. Utility suites usually focus on how the computer infrastruture operates. Most utilities perform a single task or a small range of tasks. Some utilities combined several features in one piece of sofware.
DBMS is the database management system. It is a computer software which designed of managing databases that is installed on a system hard drive or network. It is possible to designate one or more database administrators who may control each function, as well as provide other users with various levels of administration rights. DBMS can be a way for people to communicate with each other.
A spreadsheet is an application that simulate a paper, accounting worksheet. Spreadsheet normally is used for financial information as they can recalculate the whole sheet automatically to a single cell. Most spreadsheet application can link one spreadsheet to another. A change made in one spreadsheet automatically affects other spreadsheets.
Word processor is a software that people use to create, edit, and print documents. The advantage of this software is you can make changes of the document without retyping the whole. It also providing some forms of what-you-see-is what-you-get editing. Microsoft is the most common word processing software.
Sunday, 1 May 2011
Graphical user interface makes the program easier to use. Well-designed graphical use interfaces can free users from learning complex command languages. It is a computer program that enables communicating with a computer throught the use of symbols, visual metaphors, and pointing devices. It allows you let you interact by using a mouse rather than by having to type in keyboard commands. A GUI sometimes uses one or more metaphors for objects familiar in real life.
Wednesday, 27 April 2011
Friday, 22 April 2011
Internet Security Suite is another rogue security program which was found out to be a member of a large group of malicious application currently propagated via the Internet by means of a Trojan. Internet Security Suite virus will be dropped on computers even without users approval. A Trojan mentioned is able to penetrate a PC by looking for software vulnerabilities which it will manipulate to be able to gain access on victims computer. It states that computer is having problems with presence of Trojan, virus and spyware. One common alert it will display is system alert.
In computer programming, a filter is a program or section of code that is designed to examine each input or output request for certain qualifying criteria and then process or forward it accordingly. filter is "pass-through" code that takes input data, makes some specific decision about it and possible transformation of it, and passes it on to another program in a kind of pipeline. Usually, a filter does no input/output operation on its own. Filters are sometimes used to remove or insert headers or control characters in data.
In computing, a plug-in (or plugin) is a set of software components that adds specific abilities to a larger software application. If supported, plug-ins enable customizing the functionality of an application. For example, plug-ins are commonly used in web browsers to play video, scan for viruses, and display new file types. Well-known plug-ins examples include Adobe Flash Player and QuickTime. Add-on is often considered the general term comprising snap-ins, plug-ins, extensions, and themes.
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