Computer is such an electronic device that is helping to connect people all over the world today, we know that people of different caste and religion live in the whole world, their living style is different, their thinking is different. But still today the Internet has been successful in connecting all those people and this is the biggest feature of the Internet, the Internet receives data from humans as input…
Read MoreIntroduction to Wireless Networking
Wireless networking is a method by which homes, telecommunications networks and enterprise (business) installations avoid the costly process of introducing cables into a building, or as a connection between various equipment locations. Do not require physical cabling Particularly useful for remote access for laptop users Eliminate cable faults and cable breaks. Signal interference and security issue. Moving data through a wireless network involves three separate elements: the radio signals, the…
Read MoreClassification of Software
Software means a set of programs, procedures and other associated documentation which describes what the program does and how it is to be used. Hardware and software both have to work together. A number of software’s can be run on the same hardware to perform different types of jobs. The software acts as an interface between the user and the computer. Software is mainly classified into: Application Software System Software…
Read MoreComponents of Computer System
Computer system is made up of a number of components. These are 1. Input devices 2. Memory unit 3. Central processing unit 4. Output devices Central Processing Unit (CPU) The central processing unit (CPU) is where the actual processing takes place. This is where the calculations are performed and logical functions are carried out. The CPU retrieves its data and instructions from the main memory, processes the data according to…
Read MoreImportance of Networking
Information and communication are two of the most important strategic issues for the success of every enterprise. While today nearly every organization uses a number of computers and communication tools (like telephone or fax), they are often still isolated. While managers today are able to use applications like word processors or spreadsheets, not very many of them use computer-based tools to communicate with other departments or information retrieval programs. To…
Read MoreClassification of Computers
Computers are broadly classified into two categories depending upon the logic used in their design as: Analog computers In analog computers, data is recognized as a continuous measurement of a physical property like voltage, speed, pressure etc. Readings on a dial or graphs are obtained as the output, ex. Voltage, temperature; pressure can be measured in this way. Digital Computers These are high speed electronic devices. These devices are programmable.…
Read MoreFunctions of Operating System
Following are some of important functions of an operating System Memory Management Processor Management Device Management File Management Security Control over system performance Job accounting Error detecting aids Coordination between other software and users 1) Memory Management Memory management refers to management of Primary Memory or Main Memory. Main memory is a large array of words or bytes where each word or byte has its own address. Main memory provides…
Read MoreWhat is Primary Storage Device?
Primary storage is characterized by faster access time, less storage capacity and higher costs as compared to secondary storage units. Primary storage or main memory is that part of the computer system which stores the programs, data and intermediate results during the program execution. A primary storage comes as an integral part of all computer systems. It comprises of a number of small locations. Each location has a unique number…
Read MoreA Brief History of the Internet
The structure and makeup of the Internet has adapted as the needs of its community have changed. Today’s Internet serves the largest and most diverse community of network users in the computing world. A brief chronology and summary of significant components are provided in this chapter to set the stage for understanding the challenges of interfacing the Internet and the steps to build scalable internetworks. Origins of the Internet The…
Read MoreWhat is Linux operating system?
Linux (commonly pronounced) is a generic term referring to Unix-like computer operating systems based on the Linux kernel. Their development is one of the most prominent examples of free and open source software collaboration; typically all the underlying source code can be used, freely modified, and redistributed by anyone under the terms of the GNU GPL and other free software licenses. Linux is predominantly known for its use in servers,…
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