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3.1.6 Explain the function of Internet Services.
(www, email, IM, VoIP,…
3.1.6 Explain the function of Internet Services.
(www, email, IM, VoIP, FTP)
i. www
• The World Wide Web (www) provides a worldwide collection of electronic documents (webpages) for user to access.
• Each webpages can contain text, graphics, animation, audio and video.
• Webpages can be a static page or a dynamic page which can be linked to each other through a hyperlink.
Dynamic Page
• An interactive web page.
• Enables interaction with user.
• User can customize some or all of the viewed content.
Static Page
• A simple web page.
• No interactivity, programming syntax or web hosting.
• User can see the same content at a time.
ii. Email
• Email programs are available as desktop apps, web apps and mobile apps.
• Examples of desktop e-mail programs:
• Examples of free e-mail web applications:
iii. Instant Messaging
• Instant messaging (IM) is a real-time Internet service that notifies you when one or more people are online and allows you to exchange messages or files or join a private chat room with those people.
- Real-time means you and the people with whom you are conversing are online at the same time.
• Most IM today are integrated in many email service and social network.
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iv. VoIP
• Voice Over Internet Protocol (VoIP) is a technology that allows user to make voice calls using an Internet connection instead of a regular telephone line (also called Internet Telephony).
• Some VoIP services may only allow you to call other people using the same service, but others may allow you to call anyone who has a telephone number - including local, long distance, mobile and international numbers.
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Disadvantages of VoIP:
• Some VoIP services don't work during power outages and the service provider may not offer backup power
• VoIP providers may or may not offer directory assistance/white page listings.
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email web apps 
desktop email programs
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