Operating System Security Abstract Information systems are now becoming the social infrastructure so it is necessary to improve the security level because of privacy and data theft. One of the important issues which have to concern in the security of cyberspace is the security of operating system. This paper helps us to know about the security of most commercial Operating system like UNIX and Microsoft windows which are widely using in whole world. Introduction Computer system from
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1. In a multiprogramming and time sharing environment‚ several users share the system simultaneously. This situation can results in various security problems. a. What are the two such problems? Ans: The two problems in Multiprogramming and time sharing environment are Stealing or copying a user’s files; Writing over another program’s (belonging to another user or to the OS) area in memory; Using system resources (CPU‚ disk space) without proper accounting; Causing the printer to mix output by
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their operating systems. Just like a PC can run different operating systems (like Windows‚ Linux‚ BSD etc.) or different versions of the same operating system (like Windows XP‚ Windows Vista‚ Windows 7 etc.)‚ most smartphones can also run different versions of the operating system they were made for and in exceptional cases‚ they might even be able to run operating systems they weren’t made for. They can be classified in the following manner. 1. Manufacturer-built proprietary operating systems •
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A mobile operating system (mobile OS) is an OS built exclusively for a mobile device‚ such as a smartphone‚ personal digital assistant (PDA)‚ tablet or other embedded mobile OS. Popular mobile operating systems are Android‚ iOS and Windows Phone. A mobile OS is responsible for identifying and defining mobile device features and functions‚ including keypads‚ application synchronization‚ email and text messaging. Android OS is owned by Google and powered by the Linux kernel‚ it debuted in 2007.
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Network Operating Systems vs. MUOS (Multi-User) Characteristics Different methods of Multi-tasking Multi tasking is when the operating system seems to be performing two or more tasks at the same time‚ i.e. MS Word and MS Access‚ however these tasks are not actually running simultaneously as they are actually resident in memory processor is actually switching between tasks at a very high speed‚ therefore each user sees their own task as having priority. One disadvantage can be that the more
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Vista Service Pack 1 8. Which file system is used on the volume where Windows is installed? NTFS file system 9. What is the minimum number of partitions required on a hard drive that is to be set up as a dual boot with Windows 7 and Windows XP? One partition for Windows 7 and one partition for Windows XP 10. Is the built-in administrator account in Windows 7 enabled or disabled by default? In Windows XP? Disabled by default for both operating systems. 11. Which gives better security‚ workgroup
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Internet Operating Systems Andrew S Minette POS/355 University of Phoenix Internet operating systems‚ or Web operating systems‚ are not operating systems per say. There are more of user interfaces. An operating system is dependent on system hardware and uses hard disk space on a user computer to install and store applications. Web operating systems‚ however‚ depend on traditional operating systems to run an instance. According to Jonathan Strickland or How Stuff Works‚ while there may not
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HISTORY OF OPERATIMG SYSTEMS Operating systems (OS) provide a set of functions needed and used by most application programs on a computer‚ and the linkages needed to control and synchronize computer hardware. On the first computers‚ with no operating system‚ every program needed the full hardware specification to run correctly and perform standard tasks‚ and its own drivers for peripheral devices like printers and punched paper card readers. The growing complexity of hardware and application programs
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Operating system virtualization is a method of altering a standard operating system so it may handle multiple users all at the same time. These individual users would not have any interaction with one another. Their information would also remain separate‚ even though they are using the same system. While this technology has several uses‚ the most common uses are in hosting situations and server consoladation. With operating system virtualazation‚ a single system is set up to operate like several
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changing an operating system......... An operating system is the program that manages all the application programs in a computer system. This also includes managing the input and output devices‚ and assigning system resources. Operating systems evolved as the solution to the problems that were evident in early computer systems‚ and coincide with the changing computer systems. Three cycles are clear in the evolution of computers‚ the mainframe computers‚ minicomputers and microcomputers‚ and each
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