Web Design with HTML and CSS

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How web pages work.

Web Design with HTML and CSS Digital Classroom

How web pages work

You’ll benefi t from understanding the structure and function of systems that deliver the

work you design across the Internet. This lesson focuses on understanding the structure and

function of the Internet and the World Wide Web. Understanding these systems will help

you deliver your web design projects more eff ectively. You will now take a quick look at how

websites are hosted and how the pages you create end up on visitor’s computer screens and

mobile devices around the world.

The Internet and World Wide Web domain names

The Internet is based on the fundamental concept that all computers should be able to

reach each other using an address. Much like your home, apartment, or school has a street

address where the post offi ce or Fed Ex can reach you, or you have a phone number where

someone can call you, all Internet connected computers have an address known as a TCP/IP

address. The TCP/IP stands for Transmission Control Protocol/Internet Protocol, but that’s

not critically important. What you need to know is that TCP/IP allows packets of digital

information, such as your website, to be sent across networks and then reassembled once it

reaches its destination. TCP/IP addresses are commonly referred to as IP addresses.

Somefile.jpg

Somefile.jpg

Internet small “packets” and adds a header IP adds a header ETHERNET adds a header

Computer “A”

Computer “B”

Packets are re-assembled at the second computer. The protocol

“checks” to make sure all the information sent has been received

Sending

Receiving

A simplifi ed diagram of how fi les are sent over the Internet.

In the early 1990s, Sir Tim Berners-Lee took advantage of the Internet’s linked nature and

created a method for his colleagues to remotely access data that he stored on his computer.

A user anywhere in the world who had access to the Internet could connect to a server and