TUI University
Wiley, R.
CSC325
Module 3
Dr. Xiaolong Wu
The operating system's kernel controls and manages the hardware of a given computer or server, and allows applications to utilizes these resources, which in turn means the kernel provides the connection from software to hardware of a computer. The kernel and Central Processing Unit (CPU) work together, with the kernel decides which running programs to allocate to the CPU. The program is allocated by kernel, and then the CPU runs or executes the programs. Another process the kernel manages is memory management, allowing access to the system's memory to processes. In this process, the kernel decides which memory a computer process can use, and decides what to do with processes once the memory becomes full.
The process is called multitasking where multiple programs are running at once, and the kernel gives the impression all the programs are running at the same this time. The process is possible due to the kernel has a built in scheduler that determines amount time a program takes to execute. This is important when running numerous programs or applications at once that require more memory than available. This process is achieved through virtual addressing, allows the kernel to provide a physical address. The process is the creation of virtual memory providing the system more memory than what is installed on the given system. In the virtual addressing divided into two area kernel space and user space, this process prevents applications from damaging the kernel. The contributions of the kernel to operating system do not end here.
The kernel process of device management achieved through the usage device drivers, which allow the kernel to con...
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...- Dynamic Host Configuration Protocol. Retrieved from: http://compnetworking.about.com/cs/protocolsdhcp/g/bldef_dhcp.htm
Mitchell, Bradley. (2013) DNS - Domain Name System. Retrieved from: http://compnetworking.about.com/cs/domainnamesystem/g/bldef_dns.htm
Wikipedia. (17 December 2013) Operating System. Retrieved from: http://en.wikipedia.org/wiki/Operating_system#Mainframes
Wikipedia. (17 December 2013) Kernel (Computing). Retrieved from: http://en.wikipedia.org/wiki/Kernel_(computing)
Zacker, Craig. (30 September 1997) LDAP and the Future of Directory Services, Part 1. Retrieved from: http://windowsitpro.com/networking/ldap-and-future-directory-services-part-1
Zacker, Craig. (31 October 1997) LDAP and the Future of Directory Services, Part 2. Retrieved from: http://windowsitpro.com/networking/ldap-and-future-directory-services-part-2
Processor (CPU) – The processor, also known as the Central Processing Unit runs the operating system and other applications. It is constantly receiving data from the user or other active software. The data is then processed and then an output is produced which either will be displayed on screen or stored by an application.
Active directory is the backbone of Windows Server 2012 and fundamental technology in almost every business / enterprise. ADDS is the server services for security and permission in Windows environment. As we’re planning to set up three sites, create user accounts and security policies for those computers, we will need to use Active Directory. Active Directory configuration will present the most optimized replication of traffic and data between each of the three sites and provide fundamental of failover and redundancy.
Created by Philip Zimmermann in 1991, this program has been widely used throughout the global computer community to protect the confidentiality and integrity of the users’ data, giving them the privacy of delivering messages and files only to their intended individual or authorized person (Singh, 2012). Not only being useful for individuals as a privacy-ensuring program, it has also been used in many corporations to protect their company’s data from falling into the wrong hands (Rouse, 2005).
Giammarco, Erica. "U of S Central Authentication Service (CAS)." U of S Central Authentication Service (CAS). N.p., Jan. 2013. Web. 20 Nov. 2013. http://www.sciencedirect.com.cyber.usask.ca/science/article/pii/S0191886912003650?np=y
As the internet is becoming faster and faster, an operating system (OS) is needed to manage the data in computers. An Operating system can be considered to be a set of programed codes that are created to control hardware such as computers. In 1985 Windows was established as an operating system and a year earlier Mac OS was established, and they have dominated the market of the computer programs since that time. Although, many companies have provided other operating systems, most users still prefer Mac as the most secured system and windows as it provides more multiple functions. This essay will demonstrate the differences between windows
Subsequent to the Active Directory (AD) implementation discussion, this proposal addresses possible user accounts and group organizations for Riordan Manufacturing. This document discusses user and group accounts available through AD, and addresses possible implementation plans for the parent domain of riordanmanufacturing.com. These plans could also be implemented in the child domains for the four Riordan facilities, though addressing the actual implementations for those sites falls beyond the scope of this document.
Virtualization technologies provide isolation of operating systems from hardware. This separation enables hardware resource sharing. With virtualization, a system pretends to be two or more of the same system [23]. Most modern operating systems contain a simplified system of virtualization. Each running process is able to act as if it is the only thing running. The CPUs and memory are virtualized. If a process tries to consume all of the CPU, a modern operating system will pre-empt it and allow others their fair share. Similarly, a running process typically has its own virtual address space that the operating system maps to physical memory to give the process the illusion that it is the only user of RAM.
The fundamental idea behind a virtual machine is to remove the hardware of a single computer and make it a self-contained operating environment that behaves as it is a separate computer. Essentially, the virtual machine is software that executes an application and isolates it from the actual operating system and hardware. CPU scheduling and virtual-memory techniques are used so that an operating system can create the illusion that a process has its own processor with its own (virtual) memory. The virtual machine provides the ability to share the same hardware yet run several different operating systems concurrently, as shown in Figure 2-11.
CAS storage can be accessed over a local area network through the servre that runs the cas application programming interface. The CAS-API is responisible for performing ...
The operating system is a key part of the system software in any computer system. In order to do almost anything with a modern home computer you need to have a functional operating system. There are many different operating systems varying between ease of use and capability. I like to think of UNIX as being the more capable and modifiable one. Windows 8 being easier to use and more well supported for those who know little about computers. I will now provide some more back round knowledge of UNIX and show you just how versatile it is.
Melford, RJ 1993, 'Network security ', The Internal Auditor, vol. 50, no. 1, p. 18.
System units are commonly mistaken as the Central Processing unit (CPU). System units sometimes called “computer chassis”, “base units” or “Tower cases” however are simply the housing for the integral parts of a computer. System units usual house all components of a computer excluding the monitor, Keyboard and mouse. System Units are a very simple component of the computer because they do none of the actual computing. They are usually just a square or rectangular prism made of some type of plastic or metal that hold all of the vital parts of a computer in a secure manner. Other than that there is not much to be said about the system unit.
A CPU has various discrete units to help it in these tasks for example there is an arithmetic and logic unit(ALU) that takes care of all the math and logical data comparisons that need to performed. A control register makes sure everything happens in the right sequence. The motherboard is the main circuit board inside the PC. All other components are either slotted into or soldered to this board.
In designing a computer system, architects consider five major elements that make up the system's hardware: the arithmetic/logic unit, control unit, memory, input, and output. The arithmetic/logic unit performs arithmetic and compares numerical values. The control unit directs the operation of the computer by taking the user instructions and transforming them into electrical signals that the computer's circuitry can understand. The combination of the arithmetic/logic unit and the control unit is called the central processing unit (CPU). The memory stores instructions and data.
Rayne, PB, Kulkarni, P, Patil, S & Meshram, BB 2012, ‘Authentication and Authorization:Tool for Ecommerce Security’, Engineering Science and Technology: An International Journal, vol. 2, no. 1, pp. 150-157.