Functions of an OS Platform-(03) :: essays research papers

Functions of an operating(a) System Operating Systems is a reckoner program that binds the operation of the computer hardware of a computer and the execution of programs. The main(a) functions of an operating system involve1) Managing and controlling the hardware of the computer, e.g., drivers2) Interfacing between hardware and parcel, i.e. how programs and applications use hardware keyboard, mouse, monitor. 3) Managing memory, i.e., multitasking, multiprocessing and threads4) Managing and executing applications5) Diagnosing problems with software and hardware6) Managing Storage Devices and Files, e.g., NTFS and Netware file away system 7) Providing a User user interfaceAdditional Functions of a profit Operating SystemWhere multiple hosts get by the workload and resources, but separately host executes its own programs1) Connecting to the Network, e.g., net income interface card drivers, communication protocols, and thickening services.2) Enabling remote users to acce ss and parting resources, and user interfaces to use conglomerate region services, e.g., utilities, web access, SMTP.3) Provide extra security to access divided up resources, i.e., authorization (logon) and authorization (resources) services. 4) Provide applications for network use, e.g., Web, SMTP, and DHCP servers. 5) Provide network nosology utilities. Types of Network Operating SystemsPeer-to-Peer or Workgroup modeling Any computer hobo be a server or a thickening, or both. Examples of these NOS take Microsoft Networking and Windows 2k Member servers The security system is de centralize, and is stored in the local registry. Practical for networks up 5 to 10 computers with limited sharing and low security requirements. totally(prenominal) server maintains its own security system. this meaning that you must have a password on each server. Peer-to-Peer or WorkgroupsAdvantagesDisadvantages comfortable-to-share resourcesNo alter control over resourcesResources are distr ibuted across all computersNo centralized identify managementLittle administrative command overhead No centralized organizationSimple to designNo centralized security systemEasy to implement Inefficient for more than 20 computersConvienent for small groups in cheeseparing proximitySecurity must be configured manually little expensive or free software, does non require a centralized serverIncreased training to give instruction users to use their computer as both a client and a server.Domain (Client/Server) Model The duty assignment of one computer to centralize the judicial system of shared resources and security. It is generally recommended that a computer would be only use as either as a client or a server, but not both. For example, share files will be stored on the server. Windows NT/2K champaign controllers, Active directory and Netware are examples of the client Server model. Client/Server or Domain ModelAdvantagesDisadvantages centralize resource sharingSignificant ad ministrative effort and overheadFunctions of an OS Platform-(03) essays research papers Functions of an Operating System Operating Systems is a computer program that controls the operation of the hardware of a computer and the execution of programs. The primary functions of an operating system include1) Managing and controlling the hardware of the computer, e.g., drivers2) Interfacing between hardware and software, i.e. how programs and applications use hardware keyboard, mouse, monitor. 3) Managing memory, i.e., multitasking, multiprocessing and threads4) Managing and executing applications5) Diagnosing problems with software and hardware6) Managing Storage Devices and Files, e.g., NTFS and Netware file system 7) Providing a User InterfaceAdditional Functions of a Network Operating SystemWhere multiple hosts share the workload and resources, but each host executes its own programs1) Connecting to the Network, e.g., network interface card drivers, communication protocols, and cl ient services.2) Enabling remote users to access and share resources, and user interfaces to use various share services, e.g., utilities, web access, SMTP.3) Provide additional security to access shared resources, i.e., authorization (logon) and authorization (resources) services. 4) Provide applications for network use, e.g., Web, SMTP, and DHCP servers. 5) Provide network diagnostics utilities. Types of Network Operating SystemsPeer-to-Peer or Workgroup Model Any computer can be a server or a client, or both. Examples of these NOS include Microsoft Networking and Windows 2k Member servers The security system is decentralized, and is stored in the local registry. Practical for networks up 5 to 10 computers with limited sharing and low security requirements. Every server maintains its own security system. this means that you must have a password on each server. Peer-to-Peer or WorkgroupsAdvantagesDisadvantagesEasy-to-share resourcesNo centralized control over resourcesResources are distributed across all computersNo centralized account managementLittle administrative overhead No centralized administrationSimple to designNo centralized security systemEasy to implement Inefficient for more than 20 computersConvienent for small groups in close proximitySecurity must be configured manuallyLess expensive or free software, does not require a centralized serverIncreased training to educate users to use their computer as both a client and a server.Domain (Client/Server) Model The designation of one computer to centralize the administration of shared resources and security. It is generally recommended that a computer would be only used as either as a client or a server, but not both. For example, share files will be stored on the server. Windows NT/2K domain controllers, Active directory and Netware are examples of the client Server model. Client/Server or Domain ModelAdvantagesDisadvantagesCentralized resource sharingSignificant administrative effort and overhead