CHAPTER 6 Networks. Announcements Quiz 1 Grades Poster Project 3 – Access Case Due Tuesday before midnight Tuesday Class – Review and Workday on Project.

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Presentation transcript:

CHAPTER 6 Networks

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

Web Traffic and Net Neutrality

What Is a Computer Network? In a computer network, connected computers: © Ilin Sergey/Age Fotostock America, Inc. Computer at organizations do not work in isolation.

Size of Computer Networks Home computer network National computer network Global computer network INTERNET

Types of Networks

Network Fundamentals - Outline Analog and Digital Signals Communications Media and Channels Transmission Technologies Network Protocols Types of Network Processing

Analog and Digital Signals

Communications Media and Channels Twisted-pair wire Coaxial cable Fiber optics Sources: deepspacedave/Shutterst ock, GIPhotoStock/Photo Researchers, Inc, Philip Hatson/Photo Researchers

Transmission Technologies

How messages are sent: Network Protocols Most companies use Ethernet in their LAN Transmission Control Protocol/Internet Protocol (TCP/IP)

Message Transmission: Packet Switching

Types of Network Processing

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

Accessing the Internet Connecting via an online service ISP – Internet Service Provider NAP – Network Access Point Connection Methods:

Addresses on the Internet How do you get to a web address? Domain names

The Future of the Internet dataviz1.html

The World Wide Web World Wide Web

Categories of Network Applications Discovery Communication Collaboration E-Learning and Distance Learning Virtual Universities Telecommuting How do businesses use networks to improve their operations?

Network Applications: Discovery Search engines Metasearch engines Browsers

Network Applications: Communication Electronic 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.

Voice Communication Two examples of Internet telephony (VoIP) Skype Vonage

Network Applications: Collaboration Types of collaboration: Work group Virtual group (team) Virtual collaboration and Technologies: Collaboration software Electronic Teleconferencing E-Learning and Distance Learning

Telepresence Systems See video on Cisco Magicvideo Source: PRNews Foto/Polycom, Inc./NewsCom

Network Applications: Telecommuting Benefits: For Employees For Employers

Network Applications: Telecommuting Disadvantages: For Employees For Employers

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.