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BA 471 – Telecommunications and Networking

BA 471 – Telecommunications and Networking. Dr. V.T. Raja Oregon State University Raja@bus.oregonstate.edu Spring 2007. Outline. Introduction Why care about telecom/networking? Why should non-IT business students learn basics about telecom/networking? Some basics about Telecom/Networking

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BA 471 – Telecommunications and Networking

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  1. BA 471 – Telecommunications and Networking Dr. V.T. Raja Oregon State University Raja@bus.oregonstate.edu Spring 2007

  2. Outline • Introduction • Why care about telecom/networking? Why should non-IT business students learn basics about telecom/networking? • Some basics about Telecom/Networking • Analogy with effective human communication

  3. Why telecom/networking?Some Reasons • Personal Communication • Group Communication • Critical Infrastructure for • Traditional Businesses today (e.g., ERP at NIKE) • E-commerce • Acquisition decisions and associated budget allocations • IT Security Issues and Management’s Role

  4. Some Basic Characteristics of Effective Human Communication • Sender/Receiver • Messages (Words) • Transmission Media Air/Printed Page • Speak same language or have an Interpreter • Less noisy room (or) talk loud

  5. Some Basic Characteristics of Telecommunication Networks • Source; Destination – Host • Signals (Digital/Analog) • Modulation (digital to analog) • Demodulation (analog to digital) • Done by a Modem • Transmission Media • Wired/Wireless • Communications Protocols/Standards • Amplifiers/Repeaters/Internetworking Devices

  6. Wired Transmission Media • Twisted Pair Cables • Copper • Shielded and twisted to reduce noise • Coaxial Cables (Cable TV) • Fiber Optic Cables • Much faster • Able to go longer distances without a repeater • Uses light not electricity • Multi-color lights vastly increases capacity • Expensive • Wavelength Division Multiplexing

  7. Wireless Transmission • Infrared (as in a TV remote) • Radio Signals (as in microwave transmissions) • Satellites • http://www.orbitaldebris.jsc.nasa.gov/index.html • GEOS: Geosynchronous Earth Orbiting Satellites – stationary orbit at 22,300 miles above the Earth • LEOS: Low Earth Orbiting Satellites • Closer to the Earth and reachable from mobile devices • 200-1,000 miles above the Earth • Not stationary, goes around the Earth in about 90 minutes • 60-70 LEOS are needed to cover the Earth

  8. Communication Protocols • Ethernet • TCP (Transmission Control Protocol) • IP (Internet Protocol) • HTTP (Hyper Text Transfer Protocol) • SMTP (Simple Mail Transfer Protocol)

  9. Communication Protocols • Ethernet • Media Access Control (Traffic Cop – Who has access to transmission media and when? How to handle/resolve collisions?) • Error Detection/Correction • Message Delineation (Identifying beginning and ending of packets – framing) • TCP • Packetizing (Breaking messages into smaller packets and reassembling packets in the correct order) • Keeping track of packet #s

  10. Communication Protocols • IP • Addressing (DHCP and DNS) • Routing • Tracert www.__________ • Tracert www.stfx.ca

  11. Some Basic Characteristics of Telecommunication Networks • Source; Destination – Host • Signals (Digital/Analog) • Transmission Media (Wired/Wireless) • Communications Protocols/Standards • Amplifiers/Repeaters and other Internetworking Devices (e.g., hubs, switches, routers, multiplexers)

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