3.1.6 INTERNET SERVICES
www
Instant Messaging (IM)
Voice Over Internet Protocol (VoIP)
File Transfer Protocol (FTP)
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
Static Page
Dynamic Page
- An interactive web page
- Enables interaction with user
- User can customize some or all of the viewed content
- A simple web page
- No interactivity, programming syntax, or web hosting
- User can see the same content at a time
Email or electronic mail is the transmission of message and files via a computer network
FUNCTION
Allows user to create, send, receive, forward, store, print, and delete e-mail messages
One of the original Internet services on the Internet
Email programs are available as desktop apps, web apps and mobile apps
Examples:
Desktop e-mail programs: Microsoft Outlook & Opera Mail
Free e-mail web applications: Yahoo! Mail & Gmail
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
Most IM today are integrated in many email service and social network
Users need to install instant messenger software on the computer or mobile device before they can start messaging with each other
Examples:
WhatsApp Messenger
Telegram Messenger
Facebook Messenger
A technology that allows user to make voice calls using an Internet connection instead of 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
Example:
Skype
Viber
Google Hangouts
Google Duo
Advantages
Disadvantages
Do not incur extra charge beyond what the user is paying for Internet access
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
An Internet standard that permits file uploading and downloading with other computers on the Internet
Examples:
Classic FTP
Smart FTP
How FTP works?
Uploading: the process of transferring documents, graphics, and other objects from computer to a server on the Internet
Downloading: the process of a computer or device receiving information such as webpage, from a server on the Internet
FTP server is a computer that allows users to upload and/or download files using FTP