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Chapter 12 Internet Activities

Chapter 12 Internet Activities. 12.1 World Wide Web 21 12.2 Basic Uses of the Internet 22 12.3 e-Commerce 31 12.4 e-Learning 33 12.5 Public Services on the Internet 34. Chapter 12 Internet Activities. 12.2 Basic Uses of the Internet. A. Web Browsing

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Chapter 12 Internet Activities

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  1. Chapter 12 Internet Activities 12.1 World Wide Web 21 12.2 Basic Uses of the Internet 22 12.3 e-Commerce 31 12.4 e-Learning 33 12.5 Public Services on the Internet 34

  2. Chapter 12 Internet Activities 12.2 Basic Uses of the Internet • A. Web Browsing • B. Search Engines or Directories • C. E-mail 1. Dedicated e-mail software 2. Web-mail • D. E-card • E. File Transfer • F. Videoconferencing

  3. 12.2 Basic uses of the Internet 12.2.1 Web Browsing (1) • 1. Web Browser • Client software • contacts remote Web server and requests • The Web server of our school is:http://home.skhtst.edu.hk ORhttp://netdrive.skhtst.edu.hk • MS Internet Explorer and Netscape Netvigator • freeware (see Chapter 17)

  4. 12.2 Basic uses of the Internet 12.2.1 Web Browsing (2) • Downloading • receiving files from a server on the Internet • Uploading • putting files onto a server • 2. HTTP • HyperText Transfer Protocol • Set of rules used in Web browsers • Only for downloading files • To upload files to a Web server requires an FTP software

  5. 12.2 Basic uses of the Internet 12.2.1 Web Browsing (3) • 3. Interactivity • Allowing dialogs between the user and the computer • React according to the input of users • Typical example : Search Engine • Applications • e-commerce • e-learning • delivery of public services etc.

  6. 12.2 Basic uses of the Internet 12.2.2 Search Engines and Directories (1) • 1. Search Engines • An interactive program • Find Web sites using keywords • Return a list of URL of the Web sites • Refining your search • use multiple keywords to reduce the size of search results • How search engine works • Crawler: a program automatically locates new sites by following hyperlinks from server to server. • Information stored in a huge database

  7. 12.2 Basic uses of the Internet Google Yahoo! 12.2.2 Search Engines and Directories (2) • 2. Directory • A structured directory of topics • classifying topics into meaningful categories

  8. 12.2 Basic uses of the Internet 12.2.3 E-mail (1) • E-mail (electronic mail) • Exchange of messages with other users via network • e-mail accounts of users • Maintained by the mail server of an organisation • e.g. ISP, school or Web-mail company • Requires a user name and password to log on the mail server • An e-mail message consists of • The message (text + photo + animation) and/or • Attachment which is one or more files

  9. 12.2 Basic uses of the Internet 12.2.3 E-mail (2) • 1. Dedicated e-mail software • Independent of the Web browser • e.g. Microsoft Outlook or Eudora • Need configuration: • Save information about e-mail account and mail server in the computer. • Should not be used with a public computer. • Allow secure transmission • that involves digital signature (Chapter 20) • e.g. e-cert issued by The Hong Kong Post Office

  10. POP (Post Office Protocol) • POP is a communications technology for retrieving e-mail from a mail server. • SMTP (Simple Mail Transfer Protocol) • A communication technology for sending e-mail to a mail server. • Mail server • Stores e-mails and forwards new messages to user computer when he/she login the server. • Format: userid@domain.com

  11. 12.2 Basic uses of the Internet 12.2.3 E-mail (3) • 2. Web-mail using Web browser • Handled by a Web browser • e.g. Hotmail • the free e-mail service • Can send or receive mail anywhere • Should NOT be used to transmit confidential information, • e.g. credit card number, HKID or passwords etc.

  12. Advantages of e-mail • same cost for any • distance • number of recipients • fast • convenient • flexible • can attach any sort of digital files • permanent record

  13. 12.2 Basic uses of the Internet 12.2.4 E-cards • E-cards • Services provided by some Web sites • Send greetings or invitations • An e-card is usually • Web page or an animation, based on the sender’s choice • Recipient is informed through e-mail

  14. 12.2 Basic uses of the Internet 12.2.5 File transfer • HTTP • For downloading only • Single way transmission • File Transfer Protocol (FTP) • two-way file transfer • uploading files to the Web server • publish Web pages • Compared with HTTP • more simple • more efficient

  15. 12.2 Basic uses of the Internet 12.2.6 Videoconferencing • Videoconferencing • meeting of several people at different locations • Each participant has • video input device, microphone, and speakers • Dedicated software • e.g. Microsoft Messenger • Getting more popular in • conducting business meeting, training and distant learning. • Instant messaging • a real-time Internet communications service that notifies a user when one or more people are online and then allows the user to exchange messages or files or join a private chat room with them. • e.g. ICQ, msn

  16. Chapter 12 Internet Activities 12.3 E-commerce (1) • E-commerce • doing business on the Internet • for purchasing products and services online • Online storefront • a Web site including A. Electronic catalogue • information about the products and the prices B. Virtual shopping cart • used by a customer to collect items • e.g. http://www.hongkongflowershop.com C. Secure transmission • transmitting personal and financial data securely

  17. Chapter 12 Internet Activities 12.3 E-commerce (2) • The most common payment method • Credit card • Using encryption for secure transmission of • personal and financial data • Products delivered by post or delivery services • Modes of operation • B2C: business to consumer • retail online storefront • B2B: business to business • purchase orders between companies • C2C: consumer to consumer • customers post their products online for others to bid.

  18. Chapter 12 Internet Activities 12.3 E-commerce (3) • Impact of e-commerce • Allow shopping without leaving home • Security concern: • personal information is stolen during the transmission • cheated by an Internet fraud shop • Many companies are investing on this new platform • Will be more popular when • more people understand the secure transmission • further improvement in Internet security

  19. Chapter 12 Internet Activities 12.4 E-learning • E-learning • learn through electronic media, like the Internet • Ranging from learning in cyber university to life-long learning • Different from traditional lectures • Learn any time and anywhere -- No need to travel • Self-paced -- No fixed time-table or course duration. • Tools: • Text, multimedia learning material, interactive software • Most Web based courses require: • Answer certain questions before proceeding to the next • Videoconferencing-- learn with other people

  20. http://www.rthk.org.hk/elearning/GoGoJapan/map.htm

  21. Chapter 12 Internet Activities 12.5 Public Services Using the Internet • Electronic Service Delivery (ESD) Scheme • Use of IT to deliver government services • More efficient and cost-effective • saving time and money • One-stop-shop and accessible anytime. • Accessible on the Internet. • Without leaving home, you can • pay Government bills, book a squash court, renew driving licenses, register as a voter, change your personal particulars etc. • Some services require • digital certificate • e.g. paying Government bills

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