1. The Internet and connections
© EIT, Author Gay Robertson, 2017

2. The Internet …
Computer networks all round the world ‘talking to each other’
Sending, retrieving and sharing information
Connected together by phone lines, fibre, cable, wireless or satellites

3. Global network used for …..

4. The beginnings of the Internet
The Internet was started in the late 1960’s by the United States Department of Defence
The purpose was to develop a network of computers which could still function if any part of that network suffered bomb damage
In the 1990’s the Internet was opened up to the commercial world and its use has escalated since
More than 3 billion people are now using the Internet, according to the United Nations agency that oversees international communications
The number of Internet users has increased from 738 million in 2000 to 3.2 billion in 2015, according to a new report from the International Telecommunication Union

5. Structure of the Internet
The internet is international
A global collection of networks connected together into an entity we know as the Internet which anyone with access to a phone line or wireless connection can connect to
Most common language is English
The internet is author driven
Anyone can write and publish anything on the Web
Can be amateur or expert
The internet is public domain
Not owned by any one person or company
Simply a network that links willing participants
No one ‘censors’ any content on the Internet
Users are responsible for their own actions and safety

6. Connecting to the Internet

7. What do I need to connect and access information?
I’m online

8. What is Browser software …
A web browser is an end-user program that you need to use to view web pages and ‘browse’ websites which are made up of multiple web pages
Google Chrome, Internet Explorer, Safari, FireFox, Android (Dolphin) Browser are the most popular browsers

9. Modem
A modem - is used to receive (input) and send (output) digital data over a phone line. Most modems are built into your computer or device.
The sending modem modulates the data into a signal that is compatible with the phone line
The receiving modem demodulates the signal back into digital data and the data becomes input
Modem connects to an Internet service provider (ISP) ISP connects us into the Internet Internet lets us connect to any machine in the world

10. Wireless Modem
A wireless modem bypasses the telephone system and connects directly to a wireless network
A wireless network is known as a WiFi

11. What is WiFi
WiFi is a technology that uses radio waves to provide network connectivity. ALWAYS Make sure your home WiFi is secure. 
The major advantage of WiFi is that it is compatible with almost every operating system, game device, and advanced printer.  
The computer should include a wireless adapter that will translate data sent into a radio signal.
This same signal will be transmitted, via an antenna, to a decoder known as the router.
Once decoded, the data will be sent to the Internet through a wired Ethernet connection. 
WiFi enabled door chime …See, hear & speak to people from your smartphone, tablet or PC

12. What are Hotspots?
The term hotspot is used to define an area where WiFi access is available. It can either be through a closed wireless network at home or in public places such as restaurants or airports. 
In order to access hotspots, your computer should include a wireless adapter.
If you are using an advanced laptop model, it will probably include a built-in wireless transmitter already.
If it doesn't, you can purchase a wireless adapter that will plug into the PCI slot or USB port.
Once installed, your system should automatically detect the WiFi hotspots and request connection. If not, you should use software to handle this task for you. 

13. What is an ISP … Internet Service Provider
a company that sells connections to the internet (you choose how you will pay depending on how much you use the internet)
everything you send goes through your ISP
everything you receive goes through your ISP

14. Connection speeds
The speed of sending and retrieving information is dependent on the type of connection you have:
Dial-Up (Analogue 56K)
DSL – Broadband ADSL stands for Asymetrical Digital Subscriber Line (upload some data, download lots of data) Fibre is currently the fastest connection

15. Connection speeds
Cable provides an internet connection through a cable modem and operates over cable TV lines
Wireless, or Wi-Fi, as the name suggests, does not use telephone lines or cables to connect to the internet
Satellite available everywhere – check with your ISP

16. Connection speeds
3G/4G 3rd Generation 4th Generation (most current 15/11/16)
3G technology created the first networks fast enough to make smartphones practical. Before that, they were too slow to allow you do all the things that make smartphones great, like streaming videos, surfing the web and downloading music.
4G has really allowed smartphone technology to spread its wings. That’s because it’s much, much faster than 3G. So when you want to download a new game or stream a TV show in HD, you can do it without buffering and lags that make the experience not worth the wait.

17. Esc to finish A great website to go to for more help and information:
Esc to finish