Pillars of the Web

Are you wondering what the pillars of the web are? Well, you must know words such as browsers, HTML, HTTP, and URL.

Journey to the Screen

Joe wants to visit his favorite site on the?web?using the Chrome?browser. He enters the?URL?into the browser. The URL finds the real address of the server that stores the website. The browser sends an?HTTP?request message to the browser. This asks the server to send a copy of the website to the client across the internet connection.

When the server approves the client’s request, the server sends the client a “200 OK” message, then starts sending the website’s files to the browser. In order to show the web page on the screen, the browser process the?HTML?by analyzing the?tags?and?attributes?in the web page.

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Vocabulary

World Wide Web (the web)

The world wide web is a system of linked hypertext documents accessible via the Internet. The web presents content with images, text, audio and video. The content is accessed through a browser.

Browser

A browser is a software application that finds, retrieves, and presents content on the world wide web. The content can be located using a unique identifier and displayed by interpreting a set of commands and tags employed to define the format of the document retrieved. Google Chrome and Mozilla Firefox are browser applications.

HTML (hypertext markup language)

HTML is a standard markup language for creating web content. It uses well-defined labels, which enclose different elements or blocks, such as a paragraph or a table. Web content created using the HTML language is divided into well-structured sections, making it easier for the browser to display the content to the client.

HTTP (hypertext transfer protocol)

HTTP is a data transmission protocol between clients and servers. It allows the sending and receiving of information from one place to another on the web. The client can be a browser and the server stores or creates resources, such as: HTML files, images, videos, etc.

URI (uniform resource identifier)

A URI is a sequence of characters that identifies a particular resource on the world wide web, using names schemes. It can be a name, locator, or both for an online resource.

URL (uniform resource locator)

A URL is generally called a web address. It is a type of URI (uniform resource identifier) that specifies the location of a resource on a computer network.

Tags

Tags are text, keywords or a set of characters within a web page to describe the resources and define how the web browser must display the content. This text is enclosed in angle brackets, for example: <title></title>.

Attributes

Attributes are words that provide additional information about an element or modify their default functionalities. It is placed inside the element’s opening tag. For example, the filename of an image element is specified with the “src” attribute: <img src=”img_girl.jpg>

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