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Networks

Networks. MGMT 661 - Dannelly Night 2, Part 2 Chapter 7. Basic Network Types. LAN - Local Area Network small area (e.g. a building) small number of machines WAN - Wide Area Network large area usually a collection of LANS MAN - metropolitan area network. Old LAN Topologies.

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Networks

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  1. Networks MGMT 661 - Dannelly Night 2, Part 2 Chapter 7

  2. Basic Network Types • LAN - Local Area Network • small area (e.g. a building) • small number of machines • WAN - Wide Area Network • large area • usually a collection of LANS • MAN - metropolitan area network

  3. Old LAN Topologies Bus NetworkToken Ring

  4. Common LAN Topology • Star Network • Ethernetis the most common type of LAN • Advantage: • Fault Tolerant • Disadvantage: • lots of wires • requires a "switch"

  5. Network Reality Figure 7-2 from textbook

  6. Network Devices • Switch • Router • Bridge, Repeater, ... • Hub • Printers • Servers

  7. Transmission Media • Twisted-Pair • used in your house for the phone • used by a DSL Modem • also used for Ethernet • Coaxial Cable • used in your house for cable TV • used by a Cable Modem • Radio • WiFi • Bluetooth • Fiber Optic

  8. So what do I buy? • Which is better Cable or DSL? • It depends on your location. • What type of wireless router do I buy? • A • not on same frequency as phones • short range • B and G • longer range and faster than A • cordless phones can interfere • B is common in airports, etc. • N • fastest, good range • not compatible with B and G

  9. Virtual Private Networks • Cost effective method for building your own WAN. • Instead of running your own fiber optic cable, pretend that you did. • Encrypted Data is sent between office locations using a standard internet connection.

  10. The Internets • “United States President Bush used the improper pluralization of the word "Internet" publicly during the 2000 election campaign; however, the term gained cachet as an Internet humor meme only following Bush's use of the term in the second 2004 presidential election debate on October 8, 2004.” en.wikipedia.org • “It’s not a truck. It’s a series of tubes.” U.S. Senator Ted Stevens

  11. Internet History ARPAnet 1975 pic from som.csudh.edu • 1969 - ARPAnet • 1973 - ARPAnet adds 1st international nodes (London and Norway) • 1977 - first email application • 1984 - DNS introduced with 1000 nodes • 1991 - First web server • 1998 - birth of Google Inc. • 2000 - 27.5 million domains • 2011 - 130 million domains

  12. Current Number of Domains Last 24 Hours - Updated June 11, 2012 http://www.domaintools.com/internet-statistics/

  13. How to create your own domain • Register an IP Address and Name with ICANN • or use a Server Farm http://www.mygtv.net/wp-content/uploads/2009/02/farm2.jpg

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  15. October 2009 source: unknown

  16. How Info Moves on the Internet • Routing of Packets • TCP / IP mon-cre Comporium Steve's Mom and Dad Steve

  17. Net Neutrality • The Internet is mostly neutral. • Every packet is equal to every other packet, regardless of type, destination, or owner. • The Case For Neutrality: • Neutrality ensures a level playing field. • The Case Against Neutrality: • The telecom companies own the "pipes", so they should be allowed to manage them and charge for them however they want.

  18. A Non-Neutral Net http://images.appleinsider.com/netneutrality091808.png

  19. Next Class • Debates • Ethics and Social Implications • Do you have a right to privacy? • How much does ChoicePoint know about you? • What is the economic value of high speed internet saturation? • Legal Issues • How can Microsoft legally get away with selling such faulty products?

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