TYPES OF INTERNET SERVERS

TYPES OF INTERNET SERVERS

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FILE Server: A file server is the simplest servers. It manages requests from client for files stored on the server’s local disk. It allows to access different files on internet.

Mail server: A mail server is the most efficient way to receive and store electronic mail messages for a community of users.

DNS server: Domain name server is an internet-wide distributed database system that documents and distributes network-specific information, such as the associated IP address for a host name and vice versa.

Gopher server: Gopher is an internet application that uses multiple gopher servers to locate images, applications and files stored on various servers on the internet. Gopher offers menu choice to prompt users for information that interests them and then establishes the necessary network connections to obtain the resource.

Web server: The World Wide Web (WWW) is a very popular internet source of information. Web browsers present information to the users in hypertext format.

FTP server: file transfer protocol is an internet –wide standard for distribution of files from one computer to another.

News server: UseNet news is a worldwide discussion system consisting of thousands of newsgroups organized into hierarchies by subject.

Chat server: some organisations choose to run a server that will allow multiple users to have “real-time” discussions called chats on the internet.

Caching server: A caching server is employed when you want to restrict your number of accesses to the internet. There are many reasons to consider doing this. Caching server sits between the client computer and the server that would normally fulfil a client’s request. Once the client request is sent, it is intercepted by the caching server.

Proxy server: A proxy server is designed to restrict access to information on the internet. A proxy server operates on a list of rules given to it by a system administrator.

Types of servers

Database servers

Database management system (DBMS) can be divided into three primary components: development tools, user interface and database engine. The database engine does all the selecting, sorting and updating.

Application servers

An application server is a server program that resides in the server (computer) and provides the business logic for the application program. The server can be a part of the network. The server program is program that provides its services to the client program that resides either in the same computer or on another computer through the network.

Applications server’s three types:

Web information servers: This type of server employs HTML templates and scripts to generate pages incorporating values from the database in them. These types of servers are stateless servers. Such servers include Netscape serve, HAHT, ALLAIRE, Sybase and silver stream.

Component servers: The main component of these servers is to provide database access and transactions processing services to software components including DLLs, CORBA and JavaBeans, They provide environment for server-side components. Then they provide access to database and other services to the component. These types of servers are stateless.

Active application server: This type of server supports and provided a rich environment for server-side logic expressed as objects, rules and components. These types of servers are most suitable for dealing with based e-commerce and decision processing.