A lesson about differences in notions about the web and the Internet.

1. What is the difference
between
- the web ?
and
- the internet ?
–
https://www.google.co.uk/#q=what+is+the+difference+between+the+web+and+the+internet
For those who think it is the same thing, it is not.

2. Fundamentals of Internet Technology
CM0129D – single semester version
CM0130L – linked semester version
This module is about the fundamentals of Internet
technologies. The 'WEB' is one small part of the whole
technology. The module includes a selection of topics
to cover the more important areas that need to be
understood by anyone involved in any area of media
and computing.

3. Computers and Networking
Digital computer overview.
- I/O devices, CPU'S, buses.
- Memory - RAM, ROM, PROM.
PC architecture.
- x86 processor family
- CMOS Ram and setup, BIOS.
Operating systems
- Kernels, shells
- MS Windows
– UNIX
– Linux
Network & Internet technologies
- LAN, WAN, LINX, JANET
System connectivity
- Protocol stacks (TCP/IP);
Computer Networks
– Peer-to-peer systems;
– Client server systems;
Application layer
- FTP, Telnet
Visual systems
- eyes and vision
- colours, colour temperature
- television
- codecs
- compression and data rates

4. Visual technologies
Television
Broadcast media
– standards
– methods
– codecs
Vision
– RGB
– colour definitions
Coding for web delivery of audio/video material

5. Where do we begin?
Internet technologies are used extensively to build modern
communication networks.
Examples of applications that use the internet are:
The world wide web
Telephone (viber, skype)
email
texting (eg whatsapp)
Smart television (iplayer etc)
… and communication channels wifi, 3G, 4G …

6. Terminology

7. DIGITAL
● DIGITAL signals use encoded binary numbers embedded in the
signal, to represent the quantity being transmitted.
● A binary number is made up entirely from 0's and 1's, and is
transmitted in the form of electronic on/off pulses (on =1, off =0).
● Regenerated output signals are subject to "quantity" errors from
sampling at set intervals. Finer sampling improves resolution, but
needs more bandwidth.

8. Frequency and Time Period
The clock signal is used to drive the system.
__ __ __ __ __ __ __
| | | | | | | | | | | | | ----->= 1 = HIGH, YES, ON
| | | | | | | | | | | | |
|__| |__| |__| |__| |__| |__| |__---->= 0 = LOW, NO, OFF
t=time period f=1/t
f=frequency
One full time period t is the time taken for one complete cycle.
Therefore, if the time period takes 1µs. The frequency can be
calculated as 1,000,000Hz or 1MHz.

9. Serial and Parallel transmission
SERIAL DATA TRANSMISSION
___________ ______________
|INFO. | |INFO. |
|SOURCE (Tx)|--------------------->|RECEIVED (Rx) |
|___________| |______________|
PARALLEL DATA TRANSMISSION
___________ ______________
| |--------------------->| |
| (Tx) |--------------------->| (Rx) |
| |--------------------->| |
| |--------------------->| |
| |--------------------->| |
| |--------------------->| |
|___________|--------------------->|______________|

10. Digital Recording & Editing
Digital recordings are theoretically
indestructible.
If you make a mistake editing,
or don’t like the result,
you simply start again.

11. Everything
on the internet is
governed by:
NUMBERSNUMBERS

12. A look at the web : http://www.google.co.uk/
66.249.91.104
66.249.91.103
.css code file syntax
The syntax of the css file is relatively simple where a typical css file entry will look like this::
###########################################
body {
margin:20px;
padding:10px;
width:90%;
font-family:arial, verdana, helvetica, sans-serif;
font-size:80%;
background-color:#ddd;
color:#000;
}
###########################################
digital images : hue, sat, rgb

14. Digital information
is, at heart, just a
set of numbers.

15. So we start with
numbering
systems and
counting.