Module 1.3 Internet connection choices Theme: Let’s communicate.

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Presentation transcript:

Module 1.3 Internet connection choices Theme: Let’s communicate

Revision of Gr 10 and Gr 11 work What is the internet? Which type of data is sent over the internet? Name a few uses of the internet by the –Home user –Businesses What do we need for an internet connection for a home computer with a telephone connection?

Terminology Digital versus analogue signals

Terminology Band width (Kilobytes per second or Megabytes per second) Broadband

Terminology Dial-up line –Normal telephone line –Charged for length of time the call takes as well as the distance of the call. Dedicated or leased line –24 hour per day connection –Do not need to connect as in dial-up line –Pay a fixed monthly cost according to bandwidth

Methods of connecting (cables) Dial-up / non permanent –Normal telephone line with modem

Methods of connecting (cables) Dial-up / non permanent –ISDN (Integrated Services Digital Networks) Digital, not analogue as in normal telephone line More expensive than normal telephone line Faster than normal telephone line Two lines (for making phone calls and for internet connection)

Methods of connecting (cables) Permanent / dedicated / leased lines - ADSL Download speed (from ISP to client, e.g. When you download something from the Internet). Upload speed (from client to ISP, e.g. when sending an ). 256 Kbps / 128 Kbps 512 Kbps / 128 Kbps 1Mbps / 256 Kbps

Methods of connecting (cables) Permanent / dedicated / leased lines –Diginet Telkom’s dedicated lines for businesses Expensive More cost effective methods available these days

Methods of connecting (wireless) Connection via cellular technology – 3G (GPRS, EDGE, HSDPA) 3G card

Methods of connecting (wireless) Connection via cellular technology – 3G versus dial-up and modem connection speed 3G Dial-up and modem

Methods of connecting (wireless) Connection via radio technology – Sentech (MyWireless) and iBurst A modem must be installed on your computer No phone connection necessary Permanent, ‘always on’ connection to the internet Network coverage in large cities

Activity Activity 1 p 27 1 CHECK IF YOU UNDERSTAND

Activity 2 p 27 2 Activity

What to consider when looking at broadband Cost Speed Limits for downloads (caps) Mobility Coverage / availability

APPLY Activity 3 p 28 3 Activity

Places where people can connect to the Internet Cyber cafés Hot spots At home From business Anywhere

CHECKLIST  I can Activity