Chapter 1
Apr 01, 2015
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.