Apache Introduction

GOsa is an application written in the PHP programming language an tinking for use in Web pages.

Although everybody knows what is a Web page, does not come less reviewing some points:

WWW

The World Wide Web is the main core of which we know as Internet, it is a space information where each resource is identified by its URI (Universal Resource Identifier), it defines the protocol necessary to accede to the information, the machine that has it and where it is placed.

The WWW is the great revolution of our time, is an enormous source of information. And because this all the applications are being oriented. GOsa uses WWW for a simple reason, distributes the program, a Internet oriented application can be used from any place and any time. GOsa does not need to be being accesed in the same machine that has it executed, and another thing, each one of the servers whom it controls even can be in different machines and remote places.

HTTP

HTTP[14] is the acronym of HyperText Transfer Protocol, whose importantest purpose is the publication and reception of "Web pages".

It is a application level protocol invented for distributed systems of hypermedia information. It has been being used for the WWW from 1990, the current version is HTTP/1.1.

The practical operation can be reduced to a client whom makes a request and a server whom manages that request makes an answer.

HTML

If the request of the client and the answer of the server are correct, the answer of the server will contain some type of hypermedia, the most habitual is HTML (HyperText Markup Language), a language thought for publication with contents and a easy navigation by them. It is a protocol in constant development, the present version is HTML4.01 and in publication XHTML2.0

APACHE is the most used server for HTTP , secure, efficient and modular.

This manual will be centered in this server, since is the most used and has a opensource license.

More information about this server is in http://httpd.apache.org/docs-2.0/