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Introduction to MIS

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Introduction to MIS

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    1. Introduction to MIS Chapter 3 Networks and Telecommunications

    2. Networks

    3. Outline Introduction Sharing Data Sharing Hardware Sharing Software Components of a Network Computers Media Connection Devices Software Network Structure Shared Media Switched Standards The Internet How the Internet Works Internet 2 Mobile Commerce Global Telecommunications Technical Problems Political Complications Cultural Issues Comment Cases: Specialty Retail Appendix: Creating Web Pages

    4. Sharing Data: Transactions

    5. Sharing Data: Decisions & Searches Decisions & searches Teamwork & joint authorship

    6. Sharing Data: E-mail

    7. Sharing Data: Calendars

    8. Hardware Sharing Printers Storage Processors Files are transferred from workstations to the server. Software automatically copies files to tapes. LAN administrator can restore files if needed.

    9. Packet-Switched Networks Data, Voice, Video All converted to packets Packet has data, destination, and source address Switched services Packets routed as needed Reassembled at destination

    10. Network Components Computers Servers Work stations Media Cables Fiber optic Radio Infrared Connection devices

    11. Server Scalability

    12. Network Transmission Media Wired: Electricity Fiber optics Wireless Radio waves Infrared

    13. Fiber Optics Faster More data Less magnetic interference Long stretches without repeaters

    16. Frequency Spectrum All waves behave similarly Sound Radio Micro Light Frequency differences Amount of data Distance Interference / Noise

    18. Telecom Services

    19. The Importance of Bandwidth

    20. Shared Connections

    21. Time Division

    22. Frequency Division

    23. Spread Spectrum

    24. Wireless Communication

    25. Connecting Networks The need for standards A changing environment

    26. Shared-Media Network

    27. Switched Network

    28. Enterprise Network

    29. Client/Server Network Client server Peer-to-peer Operating system Multitasking

    30. TCP/IP Reference Application Mail, Web, FTP Authentication, compression, user services Transport Packetize data and handle lost packets Establish connections through numbered ports Internet Protocol (IP) Route packets to destination Requires unique host addresses: IPv4=32-bit; IPv6=128-bit Requires standards and cooperation Subnet Physical connections Transfers bits with some form of error correction

    31. ISO-OSI Reference Model

    32. Introduction to the Internet No control Services Mail Telnet FTP WWW WEB searching AltaVista HotBot Lycos WebCrawler Yahoo

    33. How the Internet Works

    34. Internet Connections Backbone providers AT&T GTE Worldcom/MCI Sprint Qwest Network service providers 1998: 39 AGIS AT&T Cable & Wireless IBM MCI/Worldcom Qwest Sprint UUNet Phone companies Regional Bell operating companies (RBOCs) (6) Competitive local exchange carriers (CLECs) (new) Cable companies AT&T Cablevision Regional. Satellite Direct Satellite Starband Internet service providers America Online Microsoft Network Earthlink

    35. M-Commerce

    36. Cell Phones and Wireless Communication

    37. Global Telecommunications Technical problems Multiple standards Language Developing nations Time zones Limits to space & waves Political complications Transborder data flows Taxes Privacy Accessibility Cultural issues What is an object? Management & control

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