# Introduction To Web and HTML

## Web
- Web is the system of interconnected networks.
- Main system which collects and serves the information is called as servers.

## Servers
- Servers are the computer which was connected to internet 24*7.
- Servers has the set of software that can understand if some other computer requests a certain information and serve that desired information, and also provides securities to the database and other information stored in it.
- Most used servers are apache2, Nginix, Microsoft IIS, Open Resty.

## HTML
- HyperText Markup Language is the markup language that makes the structured way to  write the document that browser understands and displays in the desired format.
- Person who write HTML are called HTML authors
- HTML files are saved in .html or .htm
	- .htm because in initial days, all file extension are only 3 letters, but later that is not possible and now all servers support .html  or .htm file extensions.

### index.html
- This is the file that most of the servers (even the most famous apache2) look first to start with.
- It can also default.html. But somehow all forgot this filename and everyone started with

### Basic Tags
- HTML written in the structured way that the contents will be enclosed within some tags. 
- Based on what tag we use, browser will display those content in different format

#### H1 tag
- using H1 tag will make the content displayed in Heading 1 styling

#### H2 tag
- using H2 tag will make the content displayed in Heading 1 styling

#### p tag
- using p tag will make the content displayed in paragraph styling

#### img
- img tag can be used to display images stored in the same server or in different network location.