Category: Internet



360 – SD                                          H x W

480 – SD

720 – HD

1080 – HD

What makes the web tick?

Transmission Control Protocol – movement of data

Internet Protocol Address (IP Address) –

When you open up the internet, you are the ‘client’. You go to the server. When you go onto the website, you go to HTTP.

Packets of data – the length of the packet – Binary.


1 bit is 8 bytesbitbyte

64×8 = 512,000



Header     Main Packet     Trailer


Image >

Video >

Text >

Widgets >                      Physical end

Layout >

Toolbar >

Sound >


The packet contains three things: Checksum, Source and destination address and TTL data

Source & destination address            I.P.

Checksum – Error calculations – helping you with errors

TTL Data (Time To Live) – Hops to other devices or ‘transmitted’

Website         >    Source and Destination       >     Ethernet >      Packets         >       Checksum

>                    TTL Data



Packets will become physical moving images

Reassembles more data and goes round and repeats from website to s&d etc

TCP/IP – 2 layers

Manages assembly of packets

Internet (bits)

TCP layer receives the packet (high layer)

IP layer (low layer) receives address only. They make sure they are going to the correct place.

LAN (Local Area Network) is like a bus which goes around a selected small route and hop onto a larger bus called the WAN (Wide Area Network) onto the gateway. The gateways split up the packets and will only be reassembled at the server.

From PC  which is then broken down to small pieces & reassembles + more data (on screen) at the server, which then goes back and then broken down before it is reassembled again.

State Phone call

Time – input and outpoint

Your tcp/ip is stateless

Each client request is a new request

This frees communication

Everyone continuously accessing data

Hypertext Transfer Protocol (HTTP)

Transfer Request – clicked on a button

Transfer request is stored as a hypertext. This hypertext can represent image, text and sound.


http daemon will find the image on the server


The person on the computer, also known as the client, is accessing the server which contains the data which the client is looking for. They then send a request which is broken down into small packets (which contains the source & destination address or IP, the checksum which tells you when there’s an error and TTL Data which transmits from one device to another) going from LAN to the WAN. The gateways split up the packets and will only be reassembled at the server. At the server, the packets are reassembled which collect more data so that the image which you are loading can be shown. This data is then broken down again into packets which travel back through the WAN and LAN back onto your screen which then head to the destination. Every tweet you click on sends a request from the LAN to the WAN. Then, the http is the specific image you are looking for and the hypertext (http) daemon is what finds the image on this server.