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BUS 290: Chapter 7

BUS 290: Chapter 7. Telecommunications, the Internet & Wireless Technology. Objectives. What are the principal components of telecommunications networks and key networking technologies? main telecommunications transmission media & types of network?

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BUS 290: Chapter 7

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  1. BUS 290: Chapter 7 Telecommunications, the Internet & Wireless Technology

  2. Objectives • What are the • principal components of telecommunications networks and key networking technologies? • main telecommunications transmission media & types of network? • principal technologies & standards for wireless networking, communication & Internet access? • How do the Internet & internet technology work, & how do they support communication & e-business? • Why are radio frequency identification and wireless sensor networks valuable for business?

  3. Setting the Scene “When I was young …” • Facsimile Machines (Fax) • Mail • Land lines Since about 1990 • Email & attachments • Smart Phones & Hot Spots • Networking

  4. And … • Internet is faster and cheaper than 10 yrs ago • Allows video streaming, VOIP

  5. What’s a network? • Servers and clients • Connection medium • Co-axial, fibre optics, wireless • NIC’s • Hardwire vs. wireless • Netware • Manages communication • Hub/switch/router

  6. Key Digital Technologies • Client/Server Computing • Clients (PC’s or laptops) • Powerful server – provides client with addresses • Internet is just a Client/Server network • Packet Switching • Packets are 1-1.5 Kb • Header (addresses, protocol, packet #) • Payload • Trailer (data to show end of packet, Cyclic Redundancy Check))

  7. TCP/IP & Connectivity • Transmission Control Protocol/Internet Protocol • TCP – movement between computers, sequences packets, acknowledges packets sent • IP – delivery, disassembling & reassembling • 4 layers: • Application: accesses other layers, defines protocols • Transport: communication & packet services, TCP • Internet: addressing, routing, packaging, IP • Network Interface: places on & receives packets • The 4 layers allow dif systems to communicate

  8. Networks • Analog vs. Digital signals • Modems • Larger networks = variety of techniques • Wired, wireless, Cell phones… • Backbone • LAN’s • Ethernet -> protocols & standards • MAN’s • WAN’s • The Internet

  9. LAN Topology • Star • Everything flows through the hub • Extended star • Bus • All clients “see” all messages • NIC filters out the ones for “you” • Most common Ethernet topology • Ring • Closed loop, one way traffic

  10. Know what these mean • Twisted Wire • Co-axial Cable • Fibre Optics • Bandwidth

  11. And These • ISP • DSL • T1 & T3 Dedicated Lines • IP Address • IPv4 and IPv6

  12. And these too • Domain Name System • Top level • Second level domain • FTTP • VOIP • VPN

  13. Even more… • HTML • XML • HTTP • URL • Search Engine Marketing • Shopping Bots

  14. More? • Blog • Wiki • Social Media • Semantic web

  15. And … • Bluetooth • 802.15 wireless network standard • 10 meter range, up to 8 devices • Wimax • RFID

  16. homework • 2 Decision Problems • Discussion question 2

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