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1 – Hypertext Document

Hypertext documents, more commonly known as Web documents, are now written and displayed. In addition to the facts, The information is displayed in a spreadsheet table. With images Documents that can contain information that can be filled in with information. These documents can be linked back and forth with hyperlink tags. Pre-hyperlink You can easily preview a document by clicking on it.

2 – Web Server

A web server is a web server that stores web documents on a single computer and retrieves them
It is a system designed to get water when. Chapters on how documents are organized It looks like a sack that encloses with a drawstring. Web Documents are a part of that room. Let’s say The block has an address and has a custom room number for each room. Web method, In science, a short address is called a domain name, and a room number index is called a URI (Uniform Resource Idendifier). A URL that contains a complete set of domain names and URIs URL.

This is called a Uniform Resource Locater. A URL is like a home address. In Figure 1:
Take a look.

URLs are the “lifeblood” of web technology. A URL that can be referenced directly to any Web resource. There must be one. It’s a must have, for any Affiliate, promoting any program.

3 – Web Browser

Web browser is a software that can preview web documents. Mosaic The first web browser named was no longer available. This is the most used browserMicrosoft Internet Explorer and Mozilla Firefox have been linked to Mosaic.

There are currently five popular Web browsers. Microsoft Internet Explorer, Mozilla Firefox, Google Chrome, Apple Safari and Opera. Mobile phones and tablets Android browsers, such as Mobile Safari and Opera Mobile, are becoming more and more popular Mobile browsers will also be included in the list of most popular Web browsers. The role of web browser hosting The Web Server exists according to the URL used I’m not sure what to do. This is to make sure that the information on the Web server is displayed to the user in advance. Yes.

Figure 1: => Source: www.vladstudio.com/wallpaper/?how_internet_works

1.3 – World Wide Web Consortium (W3C)

Web Technology Begins

The World Wide Web Consortium (W3C) by Tim Berners-Lee
Founded in October 1994, one of the founding members of the organization. Until the time of this writing
Except for the director, he is still in the lead. The place where it was founded was the House of Lords of America
At the Department of Computer Science (MIT / LCS), Massachusetts University of Technology. Invented the Internet with the European Union. It was established with the support of DARPA (Defense Advanced Research Projects Agency). Yes.

The main function of the W3C is to create and publish web documents. Web Server Development I’m not sure what to do. Web technology related people, including Web browser developers. It sets out the technical standards that will be followed. These technical standards will also be set Voting expert except W3C Google, Microsoft, Mozilla, Apple, Adobe, Opera and more Leading the way in Internet and Web technology Many industry professionals are also involved It depends.

1.4 – HyperText Transfer Protocol (HTTP)

Figure 1 shows the leading URL: http: // as the “transit line”. HTTP . Information , including Web Documents, is stored between the Web Server and the Web Client. It is a technology of reciprocal transportation.

Web Client is a web server that allows you to interact with a Web server by default. This is called a client. A Web browser is a Web client. Server connected Mobile apps that also capture and manage data are also Web Clients. A Web Client This process is called pre-requesting the process for retrieving information. A Web Server The process of sending back information is called a Respond. Web Client Priority will be given to requesting information.

HTTP is a client and sender of information that wants to retrieve information. It sets the standard for technology to follow. Interaction between servers.

Client Request

HTTP specification A Web client wants to retrieve information from a Web server in advance. It is in the news.

Here are some examples of ways to get more information:

GET /foo.html HTTP/1.1
Host: example.com
User-Agent: Mozilla/5.0
Accept-Encoding: gzip, deflate
If-Modified-Since: Tue, 26 Feb 2013 05:34:16 GMT

Client Request

This report is called the Request Header. The first line is called the GET Pre-Request Method. Yes ,HTTP has various request methods such as GET, POST, PUT, DELETE. Depending on the purpose, the appropriate request method will be pre-populated. The GET method is used to obtain data on the basis of sleep resistance. New Information Server If you want to create a POST, you need to use POST in advance. If you want to modify the information on the server PUT pre-watering DELETE is used before you can delete information. HEADER, DEBUG, There are other request methods such as TRACK and TRACE.

Water from the Request Method The Document URL is displayed first. You want to use the URL suffix
The HTTP version is pre-populated. The second line of the sample request header is Server The User-Agent, which is the third line, is the pre-installed client type.It’s just a show. In addition, the fourth line includes some pre-installed technologies. You will see it in advance.

Chapter 8: PHP and Apache Settings About These Advanced Techniques
I will continue to describe it.

The worst line in the sample request header is: The information you request now is the information you provided
It is advised to send it back only after the server has been modified. thisHere is an example request form specified by HTTP. Claiming with the client the content may vary depending on the purpose.

If a user wants to pre-enter a URL in the Browser Address Bar, the Web browser. HTTP Request Format If not, it will change automatically Server It will be sent to you. This We do not recommend this feature because the browser automatically deletes the feature. Found If needed Developer Tools You need to use them in advance. It is a Firefox Addon called LiveHTTPHeader.

**LiveHTTPHeader Firefox Addon**
**Link:** addons.mozilla.org/en-US/firefox/addon/live-http-headers/

This tool pre-communicates with each other when communicating between client and server. Yes. Similar add-ons are available for Google Chrome and other browsers.

Server Respond

You need to look at the server in two parts, apart from the hardware server and the software server. Hardware Server There is no direct link to HTTP due to sleep. Linux, Microsoft Windows Server, etc. Run a server operating system and store web documents and other necessary files It is a dedicated physical machine. Only the software server can send back the appropriate information based on the HTTP request. Apache, Nginx, IIS (Microsoft Internet Information Service) are the most commonly used HTTP Web Server Software.

Note : : A software server other than a web server in a hardware server that is a physical machine
There may be more. Email Server, FTP Server, SSH server etc. Individual server Port number is specified separately. So what is the incoming request? Who is responsible? Let’s do it

You will know in advance what will happen. Default Port No. for HTTP Web Server is 80. The HTTP Web Server is responsible for all requests received by the 80 entrants. It will be gone. When a user enters a URL in the Browser Address Bar, the Port No. Pre-installed Your browser will automatically start using 80 pre-installed. Port No. of a Web Server How to change settings.
This will be explained in Chapter 8, Apache and PHP Settings.

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