CHAPTER 6 Networks. Announcements Quiz 1 Grades Poster Project 3 – Access Case Due Tuesday before...
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CHAPTER 6
Networks
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Announcements
Quiz 1 Grades Poster
Project 3 – Access Case Due Tuesday before midnight Tuesday Class – Review and Workday on Project
Midterm next Thursday Tuesday will be a midterm review
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Web Traffic and Net Neutrality
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What Is a Computer Network?
In a computer network, connected computers:
1.
2.
3.
© Ilin Sergey/Age Fotostock America, Inc.
Computer at organizations do not work in isolation.
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Size of Computer Networks
Home computer network
National computer network
Global computer network
INTERNET
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Types of Networks
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Network Fundamentals - Outline
Analog and Digital Signals Communications Media and Channels Transmission Technologies Network Protocols Types of Network Processing
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Analog and Digital Signals
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Communications Media and Channels
Twisted-pair wire
Coaxial cable
Fiber optics
Sources: deepspacedave/Shutterst ock, GIPhotoStock/Photo Researchers, Inc, Philip Hatson/Photo Researchers
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Transmission Technologies
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How messages are sent: Network Protocols
Most companies use Ethernet in their LAN
Transmission Control Protocol/Internet Protocol (TCP/IP)
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Message Transmission: Packet Switching
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Types of Network Processing
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Internet and World Wide Web - Outline
Organizational use (Intranet vs. Extranet) Intranet Extranet
Internet Accessing the Internet The Future of the Internet The World Wide Web
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Accessing the Internet
Connecting via an online service ISP – Internet Service Provider NAP – Network Access Point
Connection Methods:
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Addresses on the Internet
How do you get to a web address?
Domain names
www.uncw.edu
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The Future of the Internet
http://www.akamai.com/html/technology/dataviz1.html
http://www.internettrafficreport.com/
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The World Wide Web
World Wide Web
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Categories of Network Applications
Discovery Communication Collaboration E-Learning and Distance Learning Virtual Universities Telecommuting
How do businesses use networks to improve their operations?
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Network Applications: Discovery
Search engines
Metasearch engines
Browsers
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Network Applications: Communication
Electronic mail (e-mail)
Web-based call centers (customer call center)
Electronic chat room
Voice
Unified (integration of different forms of communication)© Mario S Ragma Jr/Age Fotostock America, Inc.
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Voice Communication
Two examples of Internet telephony (VoIP)
Skype
Vonage
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Network Applications:Collaboration
Types of collaboration: Work group Virtual group (team)
Virtual collaboration and Technologies: Collaboration software Electronic Teleconferencing E-Learning and Distance Learning
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Telepresence Systems
See video on Cisco Magic
Source: PRNews Foto/Polycom, Inc./NewsCom
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Network Applications:Telecommuting
Benefits:For Employees
For Employers
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Network Applications:Telecommuting
Disadvantages:For Employees
For Employers
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Questions
Explain how the Internet works. Assume you are talking with someone who has no knowledge of information technology (in other words, keep it very simple).
How are the network applications of communication and collaboration related? Do communication tools also support collaboration? Give examples.