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Internet Technologies

Internet Technologies. National 4/5 Computing Science. Lesson aims. By the end of this lesson you will be able to: Describe what an ISP is Describe the difference between the WWW and the Internet Discuss the technologies that are used by ISP’s to allow internet access. ISP.

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Internet Technologies

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  1. Internet Technologies National 4/5 Computing Science

  2. Lesson aims • By the end of this lesson you will be able to: • Describe what an ISP is • Describe the difference between the WWW and the Internet • Discuss the technologies that are used by ISP’s to allow internet access

  3. ISP • An ISP is an Internet Service Provider • They are a company which provide you ( the customer) with access to the internet. • You will be connecting to their servers which then allows you access

  4. Internet and WWW • The internet is a collection of computers ( and networks) that are connected together • The World Wide Web is hosted (stored) on the internet.

  5. Is the web a good thing? Can you imagine not having the web?

  6. My web is slow… • You won’t always get the advertised maximum speed! • Factors such as: • Time of Day • Day of Week • Your distance from your phone exchange • How many people in your area Will all effect your connection speed

  7. What do we use the internet for? Gaming Homework Shopping Banking Social Networking TV/Video

  8. Main Technologies we will look at • ADSL (Broadband) • Fibre Optic • Mobile Internet

  9. Uploading and Downloading • Can you think when you would be downloading from the web? • Likewise can you think when you would be uploading a file from your computer to the web? • Which are you more likely to do more often?

  10. Broadband • The minimum service commitment for broadband is 2Mbps • 2 Megabits per second download rate • With the upper limit of 24Mbps • This is usually achieved by using ADSL

  11. ADSL • Asymmetric Digital Subscriber Line (ADSL) • This means your download speed is usually much higher than your download limits • ADSL works by the signal being transmitted down your phone line • Can still talk and surf at the same time

  12. Superfast broadband • The EU defines superfast broadband as: • “broadband services at an access (download) speed of more than 24 Mbps” • This is usually achieved by using fibre optic networks.

  13. Fibre optic networks • These cables are made up of glass and plastic, • This allows data to move much faster than along the copper wire used by ADSL broadband. • Fastest current rate is a download rate of 100Mbps (Nov 12) • Not available to everyone!

  14. Mobile Internet • Similar to the technology used in mobile phones • Uses the mobile (usually 3G) network to allow communication • Will usually require a USB dongle

  15. Mobile Internet • Requires mobile network coverage • Download/upload speeds can be quite slow. • Can be expensive as we are becoming very data hungry!

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