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COSC541 Data Communication and Networks Presentation

COSC541 Data Communication and Networks Presentation. Presented to: Prof. Mort Anvari Presented by: Wei, YouRong Chen, Ting. Introduction. The Two Types The History of LANs The Ideas OF Internet The Organizations. Two Types of LANs. Wired LANs Wireless LANs. The History of LANs.

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COSC541 Data Communication and Networks Presentation

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  1. COSC541 Data Communication and Networks Presentation Presented to: Prof. Mort Anvari Presented by: Wei, YouRong Chen, Ting

  2. Introduction • The Two Types • The History of LANs • The Ideas OF Internet • The Organizations

  3. Two Types of LANs • Wired LANs • Wireless LANs

  4. The History of LANs • The first paper on packet switching theory in July 1961 and the first book on the subject in 1964. • Packet switching networks for secure voice in the military in 1964. • The first public demonstration of this new network technologyto the public in Oct. 1972.

  5. The Ideas of Internet • ARPANET is the pioneering packet switching network. • In 1972, Kahn at DARPA decide to develop a new version of Transmission Control Protocol/Internet Protocol (TCP/IP) . • The first written version of the resulting approach was distributed. • DARPA let three contracts to Stanford (Cerf), BBN (Ray Tomlinson) and UCL (Peter Kirstein) to implement TCP/IP.

  6. The Ideas of Internet (Continued) • In 1976, Kleinrock published the first book on the ARPANET. • Paul Mockapetris of USC/ISI invented the Domain Name System (DNS). • Interior Gateway Protocol (IGP) used inside each region of the Internet, and an Exterior Gateway Protocol (EGP) used to tie the regions together. • Widespread development of LANS, PCs and workstations in the 1980s allowed the nascent Internet to flourish.

  7. The Ideas of Internet (Continued) • The transition of the ARPANET host protocol from NCP to TCP/IP as of January 1, 1983 was a "flag-day" style transition. • TCP/IP was adopted as a defense standard three years earlier in 1980. The transition of ARPANET from NCP to TCP/IP permitted it to be split into a MILNET supporting operational requirements and an ARPANET supporting research needs.

  8. The Ideas of Internet (Continued) • By 1985, Internet was already well established and used by other communities for daily computer communications. • MFENet, HEPNet, CSNET, USENET, BITNET, NSFNET were devised by different organizations or companies. • The backbone had made the transition from a network built from routers out of the research community to commercial equipment.

  9. Organizations • DARPA (The Defense Advanced Research Projects Agency). • ICB (International Cooperation Board). • ICCB (Internet Configuration Control Board). • IAB (Internet Activities Board). • IETF (Internet Engineering Task Force). • IESG (Internet Engineering Steering Group). • IRTF (Internet Research Task Force combined with IETF).

  10. Organizations (Continued) • CNRI (Corporation for National Research Initiatives). • W3C (World Wide Web Consortium). • Tim Berners-Lee was the inventor of the WWW. • LANs has a history of more than a hundred years.

  11. Similarities • Same Services. • Same Networking Protocols to Use. • Same Range of Users. • Same Restrictions about the Geographic Area. • Same Abilities.

  12. Dissimilarities • Transmission Media. • Topology. • Reliability. • Flexibility and Mobility. • Configurations.

  13. Dissimilarities • Cost. • Installation Flexibility. • Performance. • Throughput. • Technologies. • Security.

  14. Wireless Products • Nokia C020/C021 Wireless LAN Card . • Nokia A020 Wireless LAN Access Point . • Nokia's Wireless LAN Product Line to be Provided by TESSCO Technologies. • Ericsson’s new wireless LAN product. • Product of Planet Technology Corp. • Lucent new version of wireless LAN product line. • Product of AIRLINX Communications, INC.

  15. Wired or Wireless??? • Reasons for choosing wireless LANs. · Conventional wiring cannot be used or can only be used with great difficulty. · Conventional wiring could be used, but wireless will provide better results. · Repeated temporary setups and relocations make wiring too awkward, costly, or time-consuming. · Greater mobility is needed for LAN users.

  16. Wired or Wireless??? (Continued) • Wireless Applications: · Doctors and nurses in hospitals are more productive because hand-held or notebook computers with wireless LAN capability deliver patient information instantly. · Consulting or accounting audit teams or small workgroups increase productivity with quick network setup.

  17. Wired or Wireless???(Continued) • Wireless Applications (Continued): · Students holding class on campus greens can access the Internet to consult the catalog of the Library of Congress or class notes. · Network managers in dynamic environments minimize the overhead caused by moves, extensions to networks, and other changes with wireless LANs.

  18. Wired or Wireless???(Continued) • Wireless Applications (Continued): · Training sites at corporations and students at universities use wireless connectivity to access information, information exchanges, and learning. · Trade show and branch office workers minimize setup requirements by installing pre-configured wireless LANs needing no local MIS support.

  19. Wired or Wireless???(Continued) • Wireless Applications (Continued): · Warehouse workers use wireless LANs to exchange information with central databases, thereby increasing productivity. · Senior executives in meetings make quicker decisions because they have real-time information at their fingertips.

  20. Wired or Wireless???(Continued) • United Parcel Service (UPS) of America Inc. • Three of the top U.S. airlines had taken their competition to the airwaves with a race to provide high-speed (11 Mbps.) wireless LAN access to their customers in lounges and at gates within airport terminals.

  21. Wired or Wireless???(Continued) • Small businesses quickly adopt wireless LANs. According to Shelly Tyler, a senior analyst at Phillips InfoTech, by 2004, the wireless LAN market in the U.S. will soar to over $1.7 billion from $300 million in 1999, the research company projects.

  22. Summary • Elements to be considered when choosing Wired LANs or Wireless LANs: the cost of the physical media, the installation, the existing infrastructure, the cost of maintenance, the scalability and flexibility, the integrity and reliability, the performance (especially the speed), the interoperability, the security issue, the convenience, the obsolescence, and you should also consider the safety and the battery for mobile platforms, and so on. So the decision is definitely not easy!

  23. Summary (Continued) • The most pressing question for the future of the wired and wireless LANs is not only how the technology will change, but also how the process of change and evolution itself will be managed. Where should LANs go? Will the wired LANs be replaced with wireless LANs or the wired LANs and the wireless LANs would coexist as wireless LANs acting as the complements of wired LANs? Time will answer this tough question and we are waiting for it.

  24. Thank You!

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