Loadshedding in Karachi

Topics: World Wide Web, Client-server, Internet Pages: 7 (2806 words) Published: April 3, 2013
1. A person or thing that provides a service or commodity, in particular. 2. A computer or computer program that manages access to a centralized resource or service in a network. 3. A computer or device on a network that manages network resources. There are many different types of servers. For example: * File server: a computer and storage device dedicated to storing files. Any user on the network can store files on the server. * Print server: a computer that manages one or more printers, and a network server is a computer that manages network traffic. * Database server: a computer system that processes database queries.Servers are often dedicated, meaning that they perform no other tasks besides their server tasks. On multiprocessing operating systems, however, a single computer can execute several programs at once. A server in this case could refer to the program that is managing resources rather than the entire computer.Server TypesProxy Servers Proxy servers sit between a client program (typically a Web browser) and an external server (typically another server on the Web) to filter requests, improve performance, and share connections.Mail Servers Almost as ubiquitous and crucial as Web servers, mail servers move and store mail over corporate networks (via LANs and WANs) and across the Internet.Server Platforms A term often used synonymously with operating system, a platform is the underlying hardware or software for a system and is thus the engine that drives the server.Web Servers At its core, a Web server serves static content to a Web browser by loading a file from a disk and serving it across the network to a user's Web browser. This entire exchange is mediated by the browser and server talking to each other using HTTP.Application Servers Sometimes referred to as a type of middleware, application servers occupy a large chunk of computing territory between database servers and the end user, and they often connect the two.Real-Time Communication Servers Real-time communication servers, formerly known as chat servers or IRC Servers, and still sometimes referred to as instant messaging (IM) servers, enable large numbers users to exchange information near instantaneously.FTP Servers One of the oldest of the Internet services, File Transfer Protocol makes it possible to move one or more files securely between computers while providing file security and organization as well as transfer control.Collaboration Servers In many ways, collaboration software, once called 'groupware,' demonstrates the original power of the Web. Collaboration software designed to enable users to collaborate, regardless of location, via the Internet or a corporate intranet and to work together in a virtual atmosphere.List Servers List servers offer a way to better manage mailing lists, whether they be interactive discussions open to the public or one-way lists that deliver announcements, newsletters or advertising.Telnet Servers A Telnet server enables users to log on to a host computer and perform tasks as if they're working on the remote computer itself. Open Source Servers From your underlying open source server operating system to the server software that help you get your job done, open source software is a critical part of many IT infrastructures.Virtual Servers In 2009, the number of virtual servers deployed exceeded the number of physical servers. Today, server virtualization has become near ubiquitous in the data center. From hypervisors to hybrid clouds, ServerWatch looks at the latest virtualization technology trends.DATA BASE:A database is an organized collection of data. The data is typically organized to model relevant aspects of reality (for example, the availability of rooms in hotels), in a way that supports processes requiring this information (for example, finding a hotel with vacancies).A general-purpose database management system (DBMS) is a software system designed to allow the definition,...
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