Computer Security Many commercial software packages are designed with computer security features that control who can access the computer. These types of access controls use a process called identification and authentication. Identification verifies that the user is a valid user‚ and authentication verifies that the user is who he or she claims to be. Three common methods of authentication are remembered information‚ possessed objects‚ and biometric devices. With remembered information‚ a
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KENDRIYA VIDYALAYA SANGATHAN JAMMU REGION . STUDY/SUPPORT MATERIAL 2011-12 CLASS: XII Computer Science ACKNOWLEDGEMENTS Chief Patron Shri Avinash Dikshit Commissioner KVS‚ New Delhi Patron Shri P. K. Koul Assistant Commissioner KVS‚ Jammu Region Guidance
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UNIT - I BASIC STRUCTURE OF COMPUTERS FUNCTIONAL UNITS A computer consists of five functionally independent main parts. They are‚ ➢ Input ➢ Memory ➢ Arithmetic and logic ➢ Output ➢ Control unit Basic functional units of a computer [pic] The operation of a computer can be summarized as follows The computer accepts programs and the data through an input and stores them in the memory.The stored data
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Computer Basics Ty Christian English Allied American University Short Response Discuss where a computer stores its basic hardware settings‚ why it does so‚ and what some of those settings are. A computer is a very complex and complicated piece of equipment that take teams of professional’s to manage. What people seem to forget is even this enigma of hardware also have a very basic system that fires it up. This is called the BIOS (Basic Input/Output System). As the name suggests
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Motherboard The main board of a computer‚ usually containing the circuitry for the central processing unit‚ keyboard and monitor. PCI (Peripheral component interconnect) slot- an interconnection system between a microprocessor and attached devices in which expansion slots are spaced closely for high speed operation. 1-6 slots AGP (Accelerated graphic port)(Advanced graphic port) – an expansion slot found on many motherboards specifically designed for video graphic card. Central processing unit
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thousand servers. In a P2P network‚ the "peers" are computer systems which are connected to each other via the Internet. Files can be shared directly between systems on the network without the need of a central server. In other words‚ each computer on a P2P network becomes a file server as well as a client. P2P allows us to search for files on other people’s computers. Meanwhile‚ other users on the network can search for files on my computer‚ but typically only within a single folder that we have
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equivalent of a user manual which helps beginners or first-timers application users’ work in an unusual or new environment? Web-based Manual Online Help Webpage Webpage help II. It allows users to access and interact with software from any computer or device that is connected to the internet Web page Web Applications Web Browser Web Site III. A software consists of programs designed to make users more productive and/or assist them with personal tasks. Business Software Reference Software
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Part 1: Investigation Web Sites Chapter 4 in the textbook contains links to several web sites which are important to understanding computer investigations. In this section‚ list the web sites discussed in the chapter and include their Internet links along with a brief description of what is contained at each of these sites. www.perlustro.com Expert Computer Forensic Analysis: Specialized techniques for data recovery‚ evidence authentication and analysis of electronic data far exceeding normal
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Operating System: An operating system (OS) is a set of software that manages computer hardware resources and provides common services for computer programs. The operating system is a vital component of the system software in a computer system. Application programs require an operating system to function. Types: 1. Real-time A real-time operating system is a multitasking operating system that aims at executing real-time applications. Real-time operating systems often use specialized scheduling
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HISTORY OF COMPUTERS Ancient era Suanpan (the number represented on this abacus is 6‚302‚715‚408) Devices have been used to aid computation for thousands of years‚ mostly using one-to-one correspondence with fingers. The earliest counting device was probably a form of tally stick. Later record keeping aids throughout the Fertile Crescent included calculi (clay spheres‚ cones‚ etc.) which represented counts of items‚ probably livestock or grains‚ sealed in hollow unbaked clay containers.[1][2]
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