1. Today (Ch. 1) Explore the structure of the World Wide Web
Learn the basic principles of Web documents
Describe an Internet service provider
Identify Web design browser-related issues
Describe the different Web page viewing devices available
Identify the different types of Web sites

2. The Development of the World Wide Web
In 1989, Timothy Berners-Lee and other researchers at the CERN nuclear research facility, laid the foundation of the World Wide Web, or the Web.
created an information system that would make it easy for researchers to locate and share data
required minimal training and support
developed a system of hypertext documents, electronic files that contain elements that you can easily select

3. The Internet and the World Wide Web
The Internet is a worldwide collection of networks, each of which is composed of a collection of smaller networks
A network is composed of several computers connected together to share resources and data

4. The Internet The World Wide Web
Hart & Geller (2003), New perspectives on Macromedia Dreamweaver MX. Course Technology

5. The Internet and the World Wide Web
The World Wide Web (WWW or Web) is a graphical interface that utilizes the Internet to distribute and retrieve information
A Web site is a collection of linked Web pages
Starts with a home page
Pages are linked together with a hyperlink, or link
Surfing the Web

6. Accessing Information on the Web
Users access Web sites through the public switched telephone network (PSTN)
Worldwide telephone system that handles voice-oriented phone calls
Integral part of computer communications
Network mostly uses digital technology

7. Accessing Information on the Web
local access area
local access area
local
telephone
company
local
telephone
company
long- distance telephone company
long- distance telephone company
telephone service customer
telephone service customer

8. Dial-Up Lines
A dial-up line is a temporary connection that uses one or more analog phone lines
Requires a modem on each end of the connection
Communication ends when either modem hangs up

9. Dial-Up Lines Advantages Disadvantages
Costs no more than a regular phone call
Computers at any two locations can establish a connection using a modem and telephone network
Disadvantages
Cannot control quality of connection
Slow transfer rates

10. Dedicated Lines
A dedicated line is a connection that always is established between two communications devices
Can be analog or digital
Quality, consistency, and speed of the connection are better than a dial-up line
Businesses often use dedicated lines

11. Dedicated Lines Three popular types of digital dedicated lines
ISDN lines
Digital Subscriber Lines
T-carrier Lines

12. ISDN Lines Integrated Services Digital Network
ISDN allows a single telephone line to carry three or more signals (multiplexing)
Faster than dial-up

13. DSL Digital Subscriber Line Asymmetric Digital Subscriber Line (ADSL)
Transmits at fast speeds on existing standard copper telephone wiring
Some installations can also provide a dial tone
Asymmetric Digital Subscriber Line (ADSL)
Faster to receive data than to send data
Ideal for Internet users

14. T-carrier Lines
Any of several types of digital lines that carry multiple signals over a single communications line
Extremely fast data transfer rates
T1 Line
Most popular T-carrier line
Fractional T1
T3 Line
Equivalent to 28 T1 lines
Internet backbone uses T3 lines

15. Cable Television Lines
Allows users to connect to the Internet through their cable line
Rapid transfer rates using a cable modem connected to a CATV line

16. Fixed Wireless
Internet connectivity for users who do not have access to services such as DSL or cable
Satellite technology used instead of telephone lines
Radio signals provide high-speed connection

17. Service Providers

18. Selecting a Service Provider
Internet Service Provider (ISP)
Has permanent Internet connection
Provides temporary connections free or for a fee
Point of Presence
Regional ISP
National ISP
Earthlink and PeoplePC online

19. Service Providers Online Service Provider (OSP)
Supplies Internet access and members-only features
News, weather, financial data, games, travel guides
America Online and The Microsoft Network
Fees are slightly higher for an OSP than ISP

20. Service Providers Wireless Service Provider (WSP)
Company that provides wireless Internet access to users with wireless modems or Web-enabled handheld computers or devices
AT&T Wireless, SprintPCS
Bluetooth is a short-range wireless connection that utilizes radio frequency to transmit data between two electronic devices

21. Web Browsers
A Web browser is a specific software program required to display Web pages

22. Web Browsers
Access Web pages by entering its Uniform Resource Locator (URL) into the Web browser’s address bar
URL is comprised of the protocol, followed by the domain name
Hypertext Transfer Protocol
Domain name can be an IP address or a text version of this address

23. Web Browsers http://pucinfo.calumet.purdue.edu http://205.216.71.230
domain name
protocol
IP address
protocol

25. Web Address (URL) http://www.oswego.edu/library/index.html IP address
Protocol
Machine name
Domain name
Folder on Web server
filename
File extension

26. Alternative Web Page Viewing Devices
Smart phones
Can be used as a regular cell phone and offer and Web access
Handheld computers
Wireless, portable computers designed to fit in a user’s hand
Personal Digital Assistant (PDA)

27. Search Engines / Portals
Software programs that find Web sites and Web pages
Enter a keyword into a search engine’s text box to locate a Web page about a particular topic
Directories classify Web pages into various categories

28. Search Engines / Portals
Search services create their own Web site databases in different ways
Spiders or robots
Meta tags
Special tags added to Web pages containing information on content

29. Search Engines / Portals
Portals are web sites that offer more than just search services
, chat rooms, news and sports, etc.
Google, MSN, and Yahoo!

30. Types of Web Sites Personal Organizational / Topical Commercial
Limited developmental resources
Uses
Advertise employment credentials
Meet new friends
Share common interests
Do not post information that can be misused
Organization
Organization Web sites contain information on particular organizations
Topical Web sites contain information on the developer’s interests and hobbies
Not all information is accurate
Commercial
Used to promote and sell a product for a business via the Internet
More complex commercial Web sites generally produce greater revenue
Obtain product and service information from a company’s marketing department

31. Tools for Creating Web Pages
Hypertext Markup Language (HTML)
eXtensible Markup Language (XML), eXtensible HTML (XHTML), and Wireless Markup Language (WML)
Cascading Style Sheets
Scripting Languages

32. Hypertext Markup Language
Formatting language used to create Web pages
Defines a Web page through tags or markups
World Wide Web Consortium (W3C) sets standards for HTML and HTTP

33. XML uses markups to define the content of a Web page
eXtensible Markup Language (XML), eXtensible HTML (XHTML), and Wireless Markup Language (WML)
XML uses markups to define the content of a Web page
XHTML is a markup language that is a combination of the features of XML and HTML
WML is a subset of XML
Used to design Web pages for microbrowsers

34. Cascading Style Sheets (CSS)
Control the presentation of the content by applying styles to such elements
Type
Margins
Positioning
Colors

35. Scripting Languages Short programs that your visitors’ browsers run
Browsers must support this technology
Javascript
Active Server Pages (ASP)
Hypertext Preprocessor (PHP)
MySql

36. WYSIWYG Packages that automatically generate HTML code
There are packages available for every level of expertise
Microsoft FrontPage
Macromedia Dreamweaver
Adobe Go Live

37. Web Design Roles
Web design can be done independently or with a partner or group
Creative Role
Content writer / editor
Web page designer
Web artist / graphic designer
Multimedia producer

38. Web Design Roles Hi-Tech Role Oversight Role Web programmer
Database developer
Network / security administrator
Oversight Role
Content managers
Content management system

39. For Next Monday Lab Class (#322 Snygg)
Bring your textbooks in class and do Tutorial 1 (Case #3 p. 15) and Tutorial 2 (Case #3, pp )
Due on 2/15
Reading assignments
Shelly Ch. 1 Checkpoint
Carey, Ch. 1 for Basic HTML