Chapter 1

• Type in URL to browse a web page

• A search engine is a software program you can use to find web sites, web pages and files stored on the internet.

• Most search engine sites provide directories of websites, which are classifications of web sites according to a set of topics such as entertainment, health, science and reference, etc.

» You may communicate with your

friends through the Internet by means

of electronic mails.

» You can transmit text messages, sound,

video and files as an e-mail.

» Open an e-mail program and type the

message.

» Click the Attach

button to add

attachment.

» Type the e-mail address of the recipient.

» Click the Send

button to send

out the e-mail.

» Click Send/Recv button to receive e-mails.

» New e-mails will

be highlighted in

display.

» Files can be shared through the Internet by means of:

• download pages

• on-line storage sites

• file transfer protocol (FTP) programs

» A video conference is a meeting

between two or more geographically

separated people who use the Internet or

other computer networks to transmit

audio and video data in the meeting.

» The setup of a video conference includes:

• microphone

• speakers

• video recorder

• video conferencing software

»E-Commerce• business transactions that occur over an electronic network such as the Internet

• eliminates the barriers of time and distance that hinder traditional transactions

• You may settle your banking needs through an Internet banking site.

• You may conduct investments in securities using an on-line securities trading site.

» Business-to-Consumer (B2C)• consists of the sale of products or services from a

business to the consumers

» Business-to-Business (B2B)• consists of the sale and exchange of products and

services between businesses

» Global market opened 24 hours a day

» Reduced transaction costs

» Fast feedback

» E-learning is…• any form of learning that uses network technology such as the Internet for delivery, interaction or facilitation• a kind of distance learning, in which learning materials are accessed through the Web

» Flexibility in learning• education can take place anywhere anytime

» Updated knowledge

» Life- long learning

» Customisable study• can satisfy a person’s individual and immediate learning needs at

his/her own pace and time

» Cost-effective training

» Government services• You can make inquiries, download data and forms, or request for services through the Internet.

» Government services

Marriage registration provided in HKSAR web site

Renewal service provided in public library web site

• Most public utilities have set up their own web sites to provide timely information and services to the public.» Services offered by Public utilities

• E.g. customers can check their accounts and pay for utility bills on the Web

» Protect yourself from computer viruses• A computer virus is a program that can replicate itself and spread from one computer to the next.• The most common way that computers become infected with viruses is through e-mail attachments.

Spreading of virus through e-mail attachments

» Prevent unauthorised use of personal information• try to encrypt your message before transmitting any personal information• perform transactions that provide secure transaction functions

» Watch out for deception on the Internet• To avoid being deceived, check a digital certificate issued by a trustworthy certificate authority.