If a network uses only one server, the server provides all services to the clients. Some services include file storage, application management, printer and other peripheral management, backup and restoration services, Internet access, and so on. If not many clients are attached to the network and the server is a powerful machine, one server can easily provide all of these services.
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If, however, many clients are on a network and they all need a variety of services, it’s often a good idea to add one or more additional servers. With a second, third, and fourth server added, network efficiency improves. In a home, you’re not likely to need more than one server; in a business environment, however, using multiple servers may be necessary. You can use one server, for example, as a file and print server, and another as a backup server, Web server, database server, or other type of server, depending on the type of business you run and the amount and type of information you use in that business.
When more servers are added to a network, each server usually specializes in certain jobs to help improve productivity. For example, one server might contain all the data files and folders for all clients, one server might provide e-mail and Internet access, and another server might furnish shared applications.
Security
One of the most important services a server provides is authentication, or checking to make sure that a user has permission to access the network. In a small network, one server might perform authentication and other services. In a larger network with multiple servers, an authentication server might perform the job. Similar to Windows checking your username and password, an authentication server does not allow a user access to the network unless he or she types in the exact information called for and that information appears in the server’s master list. The list contains usernames, passwords, and user account information.
User account information includes a list of permissions, or rights, for a specific user on the network. These rights specify whether the user can access certain files, folders, and services. If a user wants to print, for example, the client computer sends a request to the server, which then either accepts or denies the request according to that user’s permissions. If the server accepts the request, the print job is then sent to the appropriate printer. The network administrator sets the rights and permissions for each user of the network.
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If, however, many clients are on a network and they all need a variety of services, it’s often a good idea to add one or more additional servers. With a second, third, and fourth server added, network efficiency improves. In a home, you’re not likely to need more than one server; in a business environment, however, using multiple servers may be necessary. You can use one server, for example, as a file and print server, and another as a backup server, Web server, database server, or other type of server, depending on the type of business you run and the amount and type of information you use in that business.
When more servers are added to a network, each server usually specializes in certain jobs to help improve productivity. For example, one server might contain all the data files and folders for all clients, one server might provide e-mail and Internet access, and another server might furnish shared applications.
Security
One of the most important services a server provides is authentication, or checking to make sure that a user has permission to access the network. In a small network, one server might perform authentication and other services. In a larger network with multiple servers, an authentication server might perform the job. Similar to Windows checking your username and password, an authentication server does not allow a user access to the network unless he or she types in the exact information called for and that information appears in the server’s master list. The list contains usernames, passwords, and user account information.
User account information includes a list of permissions, or rights, for a specific user on the network. These rights specify whether the user can access certain files, folders, and services. If a user wants to print, for example, the client computer sends a request to the server, which then either accepts or denies the request according to that user’s permissions. If the server accepts the request, the print job is then sent to the appropriate printer. The network administrator sets the rights and permissions for each user of the network.
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