Last month we learned the technologies that make up the web by going through the history of how the web comes into existence.
Today’s post, we will talk about the web itself, or the World Wide Web.
By the end of this post, you will be able to understand what is the web and the big picture of the main parts that make it possible.
What is the World Wide Web?
By definition, it is an information space where Uniform Resource Locators (URLs) identify documents and other web resources, interlinked by Hypertext links, and can be accessed via the internet. According to www.wikipedia.org
The web works that way until today. Everything is document-based that is accessed by unique URLs that identify it.
The way the web works is because of some basics ingredients as follow:
- Resources (documents like HTML, images, and other files): are the content that we want to use, websites that we want to browse, images to look at, and files that we want to share.
- Uniform Resource Locators (URLs): This uniquely identifies the resources so that your web browser can automatically show them to you or download them. Every resource on the internet has a unique URL.
- HTTP, Hypertext Transfer Protocol: this is the main ingredient that makes up the web. It is the magic that can retrieve the documents and communicates them to your web browser. In short, it handles the communication between your web browser and the server.
Besides those three main ingredients, there is more part that makes up the web.
The question to ask is how do these ingredients work?
- Resources like HTML documents, images, and other files are hosted on what we call a Web Server. Web server is just like your computers, like all other computers that run a specific software that enables it to serve up HTML documents and other resources.
We have web servers that use resources. You can use these resources from a client computer that has web browsers installed on it like internet explorer, Mozilla, google chrome. Nowadays, many client PCs are equipped with web browsers, such as desktops, laptops, and even virtual reality headsets.
- This web browser then asks the internet to serve up a specific document that lives at an address of a given URL.
- The HTTP protocol takes care of information communication between the web browser and the webserver to get the document so that the web browser can render it into the screen.
To display the HTML document, or images and other files, the web browser uses:
The web browser not only gets documents from the server. It posts HTML document that is on the client PC for instance, entering information in the form field, or text boxes, and sends back to the server for processing by using the HTTP POST operator.
The HTTP protocol takes care of this and can handle many operators.
Thanks for reading.