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Communications, Networks, the
Internet and the World Wide Web
Chapter 2
Telecommunications
• What is it?
• Give examples
Communications Network
• What is it?
• What is communications software?
Communications Channel
• What is it?
• What are they made up of?
Digital Signals
• What are they?
• What is an analog signal?
Modem
• What is it?
• Where does this word come from?
• What is an internal modem?
Network Interface card
• What is it?
LAN
• What is a LAN?
• Who does it serve?
• What is a server?
WAN
• What is a WAN?
• Who does it serve and how?
Home Network
• What are they?
School Networks
• Why have schools installed networks?
• ?
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• What does the server do in a school
network?
Wireless Revolution
• What is the wireless revolution that is
taking place in education today?
Computer Networks in Education
• What are the benefits?
• What is considered the most important
benefit?
Internet
• What networks make up the Internet?
• What are some uses of the Internet?
ARPANET
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What is it?
How did it come about?
What is a host?
Who is NSF and why are they important in
the history of the Internet?
Internet and Education
• How many schools are connected to the
Internet? ?%
• What is Internet2 (I2)
• Who are members of Internet2?
How the Internet Works
• What are
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Packets
Routers
Packet switching
What is TCP/IP
Terms
• ISP
• OSP
• WISP
Ways to Connect
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Dial-up
CATV
DSL
Satellite modem
PLC
Public Internet access point
Internet Addresses
• Why use text names?
• Domain name
• Know part A of Figure 2-19 on page 82
World Wide Web terms
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Hyperlinks
Web page or Webpage
Web site
Home page
URL
http
Web server
Web Page
• Hypertext document contains what?
• Hypermedia document contains what?
Three Types of Hyperlinks
• Target hyperlinks
• Relative hyperlinks
• Absolute hyperlinks
Discovery Learning
• What is it?
• How does the WWW facilitate it?
WWW Terms
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Webmaster
HTML
Web publishing
Web browser
Important information
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Mosaic – first graphical web browser
Microbrowser
History list
Favorite or bookmark
Web Searching
• Search tools
• Search engine
• Subject directory
Multimedia on the Web
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What is multimedia?
What is a plug-in?
What are graphics?
What is animation?
What is an animated GIF?
Multimedia (cont.)
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Audio
What are some examples of players?
Streaming audio
Video
Streaming video
Multimedia (cont.)
• Virtual Reality
• What is it?
• What are some examples?