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Server & Storage

Server

A server is a computer program that provides services to other computer programs (and their users) in the same or other computers.


In the client/ server programming model, a server program awaits and fulfills requests from client programs, which may be running in the same or other computers

Servers are often categorized in terms of their purpose. A web server, for example, is a computer program that serves requested HTML pages or files. A Web client is the requesting program associated with the user.

Here are a few types of servers, among a great number of other possibilities:

  • An application server is a program in a computer in a distributed network that provides the business logic for an application program.
  • A proxy server is software that acts as an intermediary between an endpoint device, such as a computer, and another server from which a user or client is requesting a service.
  • Mail server is an application that receives incoming e-mail from local users (people within the same domain) and remote senders and forwards outgoing e-mail for delivery.
  • A virtual server is a program running on a shared server that is configured in such a way that it seems to each user that they have complete control of a server.
  • A blade server is a server chassis housing multiple thin, modular electronic circuit boards, known as server blades. Each blade is a server in its own right, often dedicated to a single application
  • A file server is a computer responsible for the central storage and management of data files so that other computers on the same network can access them.
  • A policy server is a security component of a policy-based network that provides authorization services and facilitates tracking and control of files.

Storage

A storage device is any computing hardware that is used for storing, porting and extracting data files and objects. It can hold and store information both temporarily and permanently, and can be internal or external to a computer, server or any similar computing device.

Storage devices are one of the core components of any computing device. They store virtually all the data and applications on a computer, except hardware firmware. They are available in different form factors depending on the type of underlying device. For example, a standard computer has multiple storage devices including RAM, cache, a hard disk, an optical disk drive and externally connected USB drives.
Storage is a process through which digital data is saved within a data storage device by means of computing technology. Storage is a mechanism that enables a computer to retain data, either temporarily or permanently.


Storage is among the key components of a computer system and the two major types of storage devices are:

  • Primary /volatile Storage Devices: Requires a continuous supply of electricity to store/retain data. Generally smaller in size, are designed to hold data temporarily and are internal to the computer. They have the fastest data access speed, and include RAM and cache memory.
  • Secondary/non volatile Storage Devices: A type of storage mechanism that retains digital data even if it’s powered off or isn’t supplied with electrical power. These usually have large storage capacity, and they store data permanently. They can be both internal and external to the computer, and they include the hard disk, compact disk drive and USB storage device.
  • Mail server is an application that receives incoming e-mail from local users (people within the same domain) and remote senders and forwards outgoing e-mail for delivery.
  • A virtual server is a program running on a shared server that is configured in such a way that it seems to each user that they have complete control of a server.
  • A blade server is a server chassis housing multiple thin, modular electronic circuit boards, known as server blades. Each blade is a server in its own right, often dedicated to a single application
  • A file server is a computer responsible for the central storage and management of data files so that other computers on the same network can access them.
  • A policy server is a security component of a policy-based network that provides authorization services and facilitates tracking and control of files.

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