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 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 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 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 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,…
Read MoreWhat is DOS (Disk Operating System)?
In July 1980 IBM assigned Microsoft to develop a 18-bit operating system for the personal computer for the fee of 188,000 dollars. Although the company Digital Research of Gary Kildall already had with CP/M 88 such a 18-bit version, but by circumstances no contract has been established with IBM. Microsoft did not have yet any operating system; Microsoft licensed CP/M from Digital Research in November 1977 for 50,000 dollars. The…
Read MoreUNIX Operating System
Unix (officially trademarked as UNIX, sometimes also written as UNIX with small caps) is a computer operating system originally developed in 1969 by a group of AT&T employees at Bell Labs, including Ken Thompson, Dennis Ritchie, Brian Kernighan, Douglas McIlroy, and Joe Ossanna. Today’sUnix systems are split into various branches, developed over time by AT&T aswell as various commercial vendors and non-profit organizations. UNIX operating systems are widely used in…
Read MoreSimilarities and Difference between Human and Computer
Computer is a very effective and efficient machine which performs several activities in few minutes, which otherwise would have taken several days if performed naturally. Besides there would have been a doubt about the accuracy, finish etc. The computer may be faster; more accurate but it cannot compete with human brain. However there are some similarities between the human and the computer which would make the computer more understandable. Human…
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