1. Welcome to Cyberspace The Internet - World Wide Web
Chapter One
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2. Cyberspace
Collection of information from all computers connected to Internet
The Internet is a WAN (Wide Area Network) spanning the world
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3. The Internet Network of networks
Evolved from project through U.S. Department of Defense
Project known as ARPAnet (Advanced Research Projects Agency Network)
Used by military and academics until creation of the World Wide Web
Computer were connected to communicate with each other
Node – computer connected to network
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4. The Internet functions include
Information retrieval including
www (World Wide Web) viewing of multimedia documents
file transfer protocol - transferring files from one system to another
telephone networking – connecting to a remote system
– transferring of letters electronically
newsgroups – connecting to remote discussion groups
mailing lists – interest groups subscribed to via message
gopher – older information system (predecessor to www)
webcasting – broadcasting of real-time audio and video streams
IRC (Internet Relay Chat) - communicating with other in real-time conversations
Worldwide communications
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5. Internet Protocol
Data is transmitted from one system to another via TCP/IP
TCP/IP stands for Transmission Control Protocol/Internet Protocol
Communications protocol that allows data to be transmitted over the Internet
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6. World Wide Web Interface is similar with other Microsoft Products
WWW uses both Hypertext (links) and Hypermedia (text, graphics, sound & video), as well as Interactive pages
Hyperlink (usually underlined with pointer)
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7. The World Wide Web Client Web Server
Dr. Tim Berners-Lee, a physicist at CERN, is credited for WWW creation
Documents are published and stored on a web server
The Internet is the collection of web servers
Computers that connect to the web and request web pages (documents containing information) are called clients
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8. Hypertext Transfer Protocol (http)
Protocol used by all computers to display world wide web pages
Data transfers from client to server via http
http is part of TCP/IP protocol suites
Other protocols include
File Transfer Protocol (ftp://address here), Telephone Network (telnet://address here), Gopher (gopher://address here)…
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9. The Graphical Browser A graphical browser is needed to view web pages.
Microsoft Internet Explorer (IE)
Information on IE can be found at Internet
Explorer
Interface
Netscape Communicator
Information on Netscape can be found at
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10. The Home Page (www page)
Is the main page of an organization
Contains information, hypertext (usually presented in navigation bars) and hypermedia links to information
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11. The WWW & the URL (uniform resource locator)
The URL is a web address
URL is comprised of
Means of access,
HyperText Transfer Protocol
Internet Address (Web site) Domain Name
Document
Path (Folder or Directory)
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12. Explorer Components Pull down menus Links Toolbar Address bar (URL)
Status Bar
Hypertext link
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13. Navigating on the WWW Click in the address bar and type the URL
Use the File Open command and enter the URL
Click a hypertext link to go to another page
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14. Connecting to the Internet
LAN (local area network)
Dial-up connection to an ISP (Internet Service Provider) (software provided by ISP)
AOL (American Online)
Bell Atlantic
MSN (Microsoft Network)
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15. Hands-on Exercise One
Use Internet Explorer (on desktop) to access the Internet
Use the File, Open command to go to a URL
Use the hypertext links to view other pages
Use the back and forward buttons to navigate
Set menu options with the View, Toolbars command
Use the File, Print command to print a page
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16. Hands-on Exercise One Use the View, source menu to review HTML code.
HTML (hypertext markup language) is what web pages are written in
Use the Favorites, links, best of the web, to view other web sites
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17. Internet Explorer 5.0
Tools, options menu controls various functions of Browser
Use the menu bar to perform activities
Menus include (File, Edit, View, Favorites, Tools, and Help)
Use the favorites menu to add and organize web page addresses
Use the toolbar to access shortcuts to functions
Use the address bar to enter a web page address (URL)
Use the status bar to view current web operations
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18. Help Menu
Toolbar
Address Bar
Links/Hotspots
Status Bar
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19. Tools, Internet Options, Advanced
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20. Tools, Internet Options – show pictures off
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21. Favorites Menu
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22. Hands-on Exercise Two
Use the View, Toolbar to check and change command
Use the Tools, Internet Options, advanced tab to change Explorer options
Use the Refresh button to show screen changes
Use the Favorites, add to favorites menu to save URL addresses
Use the Help menu to obtain help
Use the history button to view sites visited
Students should review orange notes in chapter
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23. Internet Issues e-commerce – involves doing business over the Internet
Firewall – restrictions placed on web site access
Intranets (private company networks) are restricted
Spamming – messages of junk-mail content
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24. Welcome to Cyberspace The Internet - World Wide Web
Chapter Two
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25. Search Engines
Comprehensive database that are indexed to locate information on specific topics
Enter a query (keyword search) into the search form
A spider is a special program used to find new pages published on web
The spider updates the database index
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26. Search Engines There are many search engines available on Internet
Use the search button to begin a search
Popular search engines include Lycos, Infoseek, Yahoo, and Alta Vista.
Search engine returns web sites (hits) containing keywords searched for
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27. Search Button opens a window
Window containing Search Engine for keyword searching
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28. Other ways to search
Category search – locate the information based on subject categories
Site Search – Search a given web site for specific content information
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29. Hands-on Exercise One
Use the search button of Internet Explorer and carry out a search
Search for information on a specific site
Use the back and forward button to view previously visited web sites
Use the Internet to find someone located on the Internet
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30. Finer Points of Searching
Searches or queries are based on Boolean logic operators And, Or, and Not
Use the advanced search button to locate more specific searches
Use search guides/help screens to view information pertaining to advanced searches
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31. © Copyright Protection
Information on Internet is copyright protected (unless specified otherwise)
Indicate sources of materials used via footnote, reference, or bibliography
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32. Hands-on Exercise Two
Use an available search engine to locate specific information
Use the print command to print a web page
Use the right-click on a graphic and save it locally on disk
Be aware of copyright protection laws
Get permission before using graphics
Insert the picture into a wordprocessing document
Use the Insert, footnote menu to indicate address of picture location
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33. Review Appendix B
Review some of the web sites listed
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