Computers connected to the Web are called clients and servers.
- Clients are the Web user's Internet-connected devices (computer connected to Wi-Fi, or cellphone connected to mobile network) and a web browsing software on those devices (Chrome, Firefox, etc).
- Servers are computers that store webpages, sites, or apps. When a client device wants to access a webpage, a copy of the webpage is downloaded from the server onto the client machine to be displayed in the user's web browser.
- Websites are a collection of files.
- When a website is published, the files are copied to an online location that allows other people to access it too.
- When a person views a website, they are downloading a copy of these files.
- The internet is a collection of interconnected networks that all link together.
- Every computer connected to the internet is part of the network.
- Computers connect to the internet via a modem and an Internet Service Provider (ISP) The ISP then connects to a larger networks.
- Network access points (NAPs) allow these networks to link together.
- Routers ensure that correct data is transferred to it’s intended destination on each computer.
- High-speed backbones have a large capacity and interconnect at various NAPs around the world. These cables allow people from all over the globe to connect and transmit data extremely fast.
- Every computer has it’s own identifying number (IP address)
- The Domain Name System (DNS) automatically maps the IP address into a web address.
- The Uniform Resource Locator (URL) is composed of the domain name and other information such as ‘http’ and ‘www’.
