1. Computers
© 2005 Prentice-Hall, Inc.
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2. Computers
Chapter 3
Going Online
© 2005 Prentice-Hall, Inc.
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3. Computers Chapter 3 – Going Online
Objectives
Understand the scope of the online world, including how to go online and understanding Internet addresses
Utilize Internet browsers
Access various Internet applications
Be aware of critical Internet issues
© 2005 Prentice-Hall, Inc.
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4. Computers Going Online
The Internet
Internet: worldwide collection of networks
ARPANET: network for scientists that evolved into the Internet
Internet backbone: major communications lines of the Internet
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5. Computers Going Online
The Internet
No one group controls the Internet
The Internet Society
Internet Corporation for Assigned Names and Numbers (ICANN)
World Wide Web Consortium (W3C)
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6. Computers Going Online
Connecting to the Internet
Bandwidth – amount of information that can be sent over the channel
56,000 bits per second (bps)
9M (millions of bits, or megabits per second)
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7. Computers Going Online
Connecting to the Internet
Broadband – high bandwidth
Narrowband – low bandwidth
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8. Computers Going Online
Connecting to the Internet
Narrowband
dialup service
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9. Computers Going Online
Connecting to the Internet
Broadband
cable
Digital Subscriber Line (DSL)
satellite
wireless
access points
wireless LAN PC card
Wi-Fi
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10. Computers Going Online
Connecting to the Internet
Internet service provider (ISP)
Information service gateway
communications software
user ID and password
Direct LAN connection
T-1 line
T-3 line
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11. Computers Going Online
Connecting to the Internet
Transmission Control Protocol/Internet Protocol (TCP/IP)
Protocol: set of rules for how computers communicate
Packet: the part of a message that contains the data and the address the message is being sent to
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12. Computers Going Online
Connecting to the Internet
Point-of-presence (POP)
IP address
Dynamic IP address
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13. Computers Going Online
Connecting to the Internet
No PC needed
televisions
video game consoles
cellular phones
Internet appliances
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14. Computers Going Online
Retrieving and Viewing Information on the Internet
Client program – Internet browser: runs on user’s computer
Server program – runs on server computer
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15. Computers Going Online
Retrieving and Viewing Information on the Internet
Domain name: name or abbreviation of the name of the organization
Uniform resource locator (URL): address of a web page
© 2005 Prentice-Hall, Inc.
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16. Computers Going Online
Retrieving and Viewing Information on the Internet
URL
access protocol
domain name
top-level domains: denote affiliation
.com
.edu
folder
filename
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17. Computers Going Online
Internet Browsers
Browsers
retrieve and view Internet-based information
interact with servers
download and upload information
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18. Computers Going Online
Internet Browsers
Applets or ActiveX controls
give designers added flexibility
animation
multimedia displays
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19. Computers Going Online
Internet Browsers
Web site
pages
home page – first page you see at a site
hyperlinks – allow user to click on an icon and be taken to other resources on the Internet
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20. Computers Going Online
Navigating the Internet
Microsoft Internet Explorer
Netscape
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21. Computers Going Online
Navigating the Internet
Back: go to previous page
Forward: go to next page
Stop: ends transmission
Refresh: reload Web page
Favorites: have browser remember favorite sites
Location bar: where user enters URL
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22. Computers Going Online
Browser Plug-ins
Plug-in – gives the browser added capabilities
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23. Computers Going Online
Browser Plug-ins
Shockwave Player
Flash Player
RealJukebox
Liquid Player
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24. Computers Going Online
Browser Plug-ins
Windows Media Player
QuickTime
iPix Movies
Acrobat Reader
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25. Computers Going Online
Browser Plug-ins
Streaming audio and video
media is presented continuously instead of being downloaded
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26. Computers Going Online
Internet Resources and Applications
Finding information on the Web
browsing: just looking around
searching: trying to find specific information
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27. Computers Going Online
Browsing the Net
Portal –site that provides a number of services
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28. Computers Going Online
Searching the Net
Search engine – resource that finds sites based on user input
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29. Computers Going Online
Tips for Searching the Net
Read the rules for each search engine
Try multiple search engines
Follow hyperlinks
Choose search terms carefully
Be persistent
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30. Computers Going Online
Searching the Net
Hits
page is retrieved for viewing
page is listed in search engine results
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31. Computers Going Online
Searching the Net
Frequently Asked Questions (FAQs)
lists answers to questions asked often at a particular site
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32. Computers Going Online
Internet Applications
Servers
user-friendly
multimedia documents
hyperlinks
interactive
frames
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33. Computers Going Online
Internet Applications
File Transfer Protocol (FTP) servers
easily download/upload files
Anonymous FTP sites
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34. Computers Going Online
Communicating over the Internet
server
file attachments
Newsgroups
Mailing lists or listservs
push technology
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35. Computers Going Online
Cybertalk
Emoticons or smileys
;-)
: -)
: -( 
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36. Computers Going Online
Netiquette
Using all capital letters is considered SHOUTING
Never send unsolicited (spam)
Consider your audience when forwarding Internet content
© 2005 Prentice-Hall, Inc.
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37. Computers Going Online
Netiquette
Never reveal others’ personal information
Be patient with people who are just getting online (newbies)
Don’t comment on others’ spelling, grammar, or punctuation
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38. Computers Going Online
Netiquette
Keep private communications private
Consider attachment size before sending to someone using dialup
Confirm virus warnings before forwarding
Use an anti-virus program
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39. Computers Going Online
Internet Applications
Webcasting
Jukebox
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40. Computers Going Online
Internet Issues
Shady side of the Internet
hackers and crackers
hate mongers
pornography
filtering programs
gambling
© 2005 Prentice-Hall, Inc.
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41. Computers Chapter 3 – Going Online
Lesson Summary
Understand the scope of the online world, including how to go online and understanding Internet addresses
Utilize Internet Browsers
Access various Internet applications
Be aware of critical Internet issues
© 2005 Prentice-Hall, Inc.
Slide 41