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Chapter 1 practice 3 introduction to the internet
The document provides an overview of the internet and how it functions. It discusses that the internet is a network of networks that began in 1969 as ARPANET and has no central authority. It also describes that the World Wide Web is a subset of the internet consisting of hypertext documents linked together from computers around the world. Finally, it explains the client/server model where servers store documents and clients request and display them through browsers.
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Chapter 1 practice 3 introduction to the internet
- 1. Introduction to theInternet
- 2. The Internet • Anetwork of networks • Began in 1969 as ARPANET (Advanced Research Projects Agency Network) • No central authority and thus impossible to state the precise size • The Internet is not free just because you do not pay for it
- 3. The World WideWeb • A subset of the Internet consisting of all computers with hypertext or hypermedia documents • These documents contain references (links) to other documents which may be on a different computer anywhere in the world • Began in 1991 at the European Particle Physics Laboratory (CERN) in Switzerland
- 4. A Client/Server Model •A server (Web server or Web site) is any computer that stores hypermedia documents and furnishes them upon request • A client is any computer that requests, then displays, hypermedia documents • Every client must be able to display every document from every server and does so through a browser (e.g., Netscape or Internet Explorer)
- 5. Connecting to theInternet • At Work or School – Via a Local Area Network (LAN) • At Home – Traditional Modem (56KB) – Cable Modem – DSL Modem
- 6. Uniform Resource Locator(URL) http://www.annex.com/southwest/museum.htm Document Path (Directory or Folder) Internet Address (Web site) Means of access, HyperText Transfer Protocol
- 7. Acronyms Abound • HTTP– HyperText Transfer Protocol is used to transmit Web documents • HTTPS – Secure protocol for confidential transactions • HTML – Hypertext Markup Language is the language for all Web Documents • ISP – Internet Service Provider
- 8. Suggestions for Searching •Use the Search button on the Internet Explorer Toolbar • Try multiple search engines on one query • Be aware of logical operators - AND, OR, and NOT • Search on a concept; e.g., “first ladies” rather than “Eleanor Roosevelt” • Set Bookmarks/Favorites
- 9. E-commerce • The exchangeof goods and services – Buyer and seller – Products and suppliers – A place to “meet” – Marketing to attract the buyer – Accept and process the order • All of these elements are present in e- commerce and traditional commerce
- 10. Advantages of E-commerce •For the Seller: • For the Buyer: – Open 24/7 – Open 24/7 – Shoppers from anywhere – Never leave home – Virtual inventory is – Easy to view and cheaper and extensive explore product line – Lower transaction costs – Comparison shop – Target your customers – Web site knows you
- 11. Security and Privacy •Secure transactions – Https protocol – Encryption • Privacy – A cookie is a small file written to your disk each time you visit a site – Problems occur when one site can read many cookies; e.g. Double Click.com