BA 471 – Telecommunications and NetworkingOutlineWhy telecom/networking? Some ReasonsSome Basic Characteristics of Effective Human CommunicationSome Basic Characteristics of Telecommunication NetworksWired Transmission MediaWireless TransmissionCommunication ProtocolsSlide 9Slide 10Slide 11BA 471 – Telecommunications and NetworkingDr. V.T. RajaOregon State [email protected] 2007Outline•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 communicationWhy 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 RoleSome Basic Characteristics of Effective Human Communication•Sender/Receiver•Messages (Words)•Transmission MediaAir/Printed Page•Speak same language or have an Interpreter•Less noisy room (or) talk loudSome 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 DevicesWired 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 MultiplexingWireless 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 EarthCommunication Protocols•Ethernet•TCP (Transmission Control Protocol)•IP (Internet Protocol)•HTTP (Hyper Text Transfer Protocol)•SMTP (Simple Mail Transfer Protocol)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 #sCommunication Protocols•IP–Addressing (DHCP and DNS)–Routing•Tracert www.__________•Tracert www.stfx.caSome 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,
View Full Document
Unlocking...