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WWW, ISP, URL, Search the Web Chapter 2 – Page 35 – 66 of Textbook using Information Technology by Williams and Sawyer, fifth edition, ISBN 0-07-115105-2 The Internet & the World Wide Web Exploring Cyberspace

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www isp url search the web

WWW, ISP, URL, Search the Web

Chapter 2 – Page 35 – 66 of Textbook using Information Technology by Williams and Sawyer, fifth edition, ISBN 0-07-115105-2

the internet the world wide web exploring cyberspace
The Internet & the World Wide WebExploring Cyberspace
  • 2.1 Choosing Your Internet Access Device & Physical Connection: The Quest for Broadband
  • 2.2 Choosing Your Internet Service Provider (ISP)
  • 2.3 Sending & Receiving E-Mail
  • 2.4 The World Wide Web
  • 2.5 The Online Gold Mine: More Internet Resources, Your Personal Cyberspace, E-Commerce, & the E-conomy

Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc.

2 1 choosing your internet access device physical connection the quest for broadband
2.1 Choosing Your Internet Access Device & Physical Connection: The Quest for Broadband
  • Bandwidth - an expression of how much data can be sent through a communications channel in a given amount of time
  • Broadband - very high speed connection

Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc.

slide4
Download - to transmit data from a remote computer to a local computer
  • Upload - to transmit data from a local computer to a remote computer

Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc.

telephone dial up modem low speed but inexpensive widely available
Telephone (Dial-Up) Modem: Low Speed but Inexpensive & Widely Available
  • Modem - device that sends and receives data over telephone lines to and from computers
  • Most modems today have a maximum speed of 56 Kbps.

Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc.

high speed phone lines more expensive but available in most cities
High-Speed Phone Lines: More Expensive but Available in Most Cities
  • ISDN - hardware and software that allows voice, video, and data to be communicated over traditional copper-wire telephone lines, up to 128K bps
  • DSL - also uses regular phone lines but much faster than ISDN, could be up to 2 Mbps
  • T1 - a traditional trunk line that carries 24 normal telephone circuits and has a transmission rate of 1.5 Mbps
  • T2 – 6 Mbps

Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc.

slide7
Cable Modem: Close Competitor to DSL

Cable modem - connects a personal computer to a cable-TV system that offers an Internet connection

Wireless Systems: Satellite & Other Through-the-Air Connections

Satellite

Radio waves between cellular towers

Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc.

2 2 choosing your internet service provider isp
2.2 Choosing Your Internet Service Provider (ISP)
  • ISP - a company that connects you through your communications line to its servers, or central computer, which connect you to the Internet via another company’s network access points
  • Example, netvigator, icable etc.

Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc.

2 3 sending receiving e mail e mail software carriers
2.3 Sending & Receiving E-MailE-Mail Software & Carriers
  • Buy e-mail software
  • Get e-mail program as part of other computer software (such as browser)
  • Get e-mail software as part of your ISP package
  • Get free e-mail services

Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc.

e mail addresses
E-Mail Addresses
  • dcykcho@cityu.edu.hk
  • User name: dcykcho
  • Domain name: cityu
  • Top-level domain: .edu
  • Two-letter country extension: .hk

Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc.

netiquette appropriate online behavior
Netiquette: Appropriate Online Behavior

Avoid flaming

Don’t SHOUT!

  • Consult FAQs

Emoticons

Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc.

netiquette appropriate online behavior12
Netiquette: Appropriate Online Behavior
  • Avoid sloppiness but avoid criticizing others’ sloppiness
  • Don’t send huge file attachments, unless requested
  • When replying, quote only the relevant portion!

Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc.

spam unwanted junk e mail
Spam: Unwanted Junk E-Mail
  • Delete without opening the message
  • Never reply to a spam message!
  • Enlist the help of your ISP or use spam filters
  • Fight back

Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc.

2 4 the world wide web
2.4 The World Wide Web
  • Q: What makes the Web graphically inviting?
  • A: Multimedia
  • Q: What makes the Web easily navigable?
  • A: Hypertext

HTML & resulting page

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the web how it works
The Web & How It Works
  • Website--the domain on the computer
  • Site - a computer with a domain name
  • Example: cityu
  • Website - the location of a web domain name in a computer somewhere on the Internet

Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc.

the web how it works16
The Web & How It Works
  • Web pages--the documents on a website
  • Web page - a document on the WWW that can include text, pictures, sound, and video
  • Example: City University of Hong Kong CityU

Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc.

the web how it works17
The Web & How It Works
  • Browsers--software for connecting with websites
  • Web browser - software that enables users to view web pages and to jump from one page to another
  • Best-known browsers:
    • Microsoft’s Internet Explorer
    • Netscape Navigator

Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc.

the web how it works18
The Web & How It Works
  • URLs--addresses for web pages
  • http://personal.cityu.edu/~dcykcho//index.htm
  • Protocol : http://
  • Domain name: personal.cityu.edu.hk
  • Directory name: ~dcykcho
  • File name: index.htm

Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc.

using your browser to get around the web
Using Your Browser to Get Around the Web
  • Home page - the first page you see when you start up your browser
  • Getting around:
  • Back - takes you back to the previous page
  • Forward - takes you to a page you returned from
  • Home - takes you to your home page

Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc.

using your browser to get around the web20
Using Your Browser to Get Around the Web
  • History list - list accessible from browser’s toolbar that allows you to return to a page you have recently visited
  • Bookmarks or favorites - your favorite URLs stored in a list to permit frequent visits without retyping the URLs
  • Simultaneous viewing of two pages via File menu’s “New” item

Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc.

using your browser to get around the web21
Using Your Browser to Get Around the Web
  • Interactivity--hyperlinks, radio buttons, and fill-in text boxes
  • Radio buttons - little circles located in front of various options; selecting an option with the mouse places a dot in the corresponding circle

Radio buttons and textbox

Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc.

web portals starting points for finding information
Web Portals: Starting Points for Finding Information
  • Web portal - website that groups together in one convenient location popular features such as search tools, e-mail, electronic commerce, and discussion groups

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web portals starting points for finding information23
Web Portals: Starting Points for Finding Information
  • After logging on, you can:
  • Check the home page for general info
  • Use the directories to find a topic
  • Use keyword to search for a topic

Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc.

four types of search engines
Four Types of Search Engines
  • Human-organized search sites
  • Computer-created search sites
  • Hybrid search sites
  • Metasearch sites

Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc.

summary
Summary
  • Bandwidth: telephone line 56K bps, ADSL: 2 Mbps, T1, 1.5 Mbps
  • ISP: Internet Service Provider: PCCW, Netvigator, icable
  • Browser: IE Explorer 6.0, and Netscape 6.0
  • Search Engine: Altavista, Timway (Hong Kong)
  • Portal: Yahoo, Geocities

Copyright © 2003. Exclusive rights by The McGraw-Hill Companies, Inc.

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