Internet - Is a collection of networks which helps everything connect to each other

World Wide Web - Part of the internet that the user can access as a collection of web pages

URL (Uniform Resource Locator) is used to access a  website and display web pages. The user must put in the website's address which is the URL and is a unique text based address that relates to a web page. The web address is made up of (PHDLR)

• Protocol - A protocol is a set of rules that allows two devices to communicate

• Host - WWW

• Domain Name - Official name of a website

• Location - Location of what you are searching for in a website

• Resource - portion of source where you get the information eg.org

HTTP and HTTPS - Hypertext Transfer Protocol: Is a way for clients and servers to send and receive requests and deliver HTML web pages. The S stands for Security as the website is encrypted and secure and is used with sensitive data and information

A web server is a computer that hosts a website. A web server can host many websites and stores each page of the website and its related content. To retrieve information it is known as downloading. A computer that accesses information from a website server is referred to as a client.

Web servers do : 

• Hosting websites

• Dealing with client requests

They can be stored as text, HTML, CSS or Javascript and is stent to a browser with various rules to render it correctly so then can be seen on the receiving/clients screens

Domain Name Server : Websites are written in HTML and hosted on a web server. To display pages from a particular website your browser needs to know the IP address for that website which it looks for in the Domain Name Server, (DNS) 

Webserver and Clients : The client requests a URL via a web browser

1. The browser sends the domain name to a domain name server (DNS)

2. The DNS maps the domain name to an IP address and returns it to the browser

3. A GET request for the web page is sent to the web server using its IP address

4. The requested web page is returned to the client’s web browser