IT 2203 : Operating Systems Chapter 1: Introduction What Operating Systems Do Computer-System Organization Computer-System Architecture Operating-System Structure Operating-System Operations Process Management Memory Management Storage Management Protection and Security Computing Environments Open-Source Operating Systems Saminda Premaratne What is an Operating System? A program that acts as an intermediary between a user of a computer and the computer hardware Operating system goals: Execute
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many reasons why Windows operating system could be called an event-driven application. The first reason why Windows operating system might be viewed as an event-driven application is that the start button on the operating system can be activated through a click event. This means if a user uses their mouse to click on the start button‚ the start button will activate and the start buttons list will appear with other functions. Nearly everything on the Windows operating system is event-driven. Another
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known malware are viruses‚ worms‚ Trojan horses‚ and spam. However‚ there are other forms of malware which are just as dangerous. A very hard type of malware to detect is called a rootkit. This form of malware will conceal itself within the operating system code to hide itself from detection. Rootkits may also hide itself within other programs. When installed‚ the attacker will now have access to the infected computer and view any file or carry out other attacks from the computer. This can be
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once reluctant to try a new operating system are now keen on taking a chance because of the brand itself and marketing techniques. The operating system and software applications are creative and a step ahead from their competitors Explaining of operating system/ software application The operating system for the Apple Inc is known as OS X. The operating system is created to run on Apple
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same time‚ computer crimes are also increasing. Countermeasures are developed to detect or prevent attacks - most of these measures are based on known facts‚ known attack patterns. Countermeasures such as firewalls and network intrusion detection systems are based on prevention‚ detection and reaction mechanism; but is there enough information about the enemy? As in the military‚ it is important to know‚ who the enemy is‚ what kind of strategy he uses‚ what tools he utilizes and what
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of which are physical objects that you can actually touch. In contrast‚ software is untouchable. Software exists as ideas‚ application‚ concepts‚ and symbols‚ but it has no substance. A combination of hardware and software forms a usable computing system. They are input devices‚ output devices‚ storage‚ and processing. 2. The functions of the following hardware in a computer network I. Modem Ii. Multiplexers Iii. Switches Iv. Routers V. Bridges The Function of a Modem A modem changes computer data
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computers running the Mac operating system Apple systems continue to be a force for the company since the closure of the operating system‚ reducing leaks viruses and spyware‚ such as those affecting the Windows system (Apple Inc.‚ 2009). Weaknesses One of the weaknesses affecting Apple is not a leader in the computer market. The Mac operating system‚ has a minority share in the computer market‚ which is dominated by manufacturers who use competent operating systems like Windows. Another weakness
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all you could ever find inside the workplace‚ colleges‚ and at home. Until one day a new kind of computer was designed. This computer had a mouse with only one button on it and didn’t have a start button on the bottom left corner. At first these systems seemed very confusing‚ but as people began to use it‚ they found that it was simpler and more productive at work. This new design was called the iMac and it finally gave Microsoft some competition. Ever since then‚ Apple and Microsoft have both
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programs‚ and e-mail exchange operations as well as web server and Internet programs (Garza‚ 2010). Windows Server local policies have the ability to perform certain operational commands. These are operations available to the domain controller network system. This means that Window Server can centralize user and computer access. Only one machine needs to be configured as the Domain Controller rather than all machines on the network. Disadvantages The biggest issue that Windows Server has
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design any software to be installed on it. After receiving this news‚ Bill Gates and his friend Paul Allen were inspired to try to create a special BASIC language for Altair. Therefore‚ they contacted the boss of Micro Instrumentation and Telemetry Systems (MITS)‚ which create the microcomputer‚ told him about this‚ and the boss required them to demonstrate. BASIC‚ as its name means‚ was one of the most simple but high-level programming language to write and design software. Gates and Allen had done
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