Networks MGMT 661 Dannelly Night 2 Part 2

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 Bus Network Token Ring

Common LAN Topology • Star Network ▫ Ethernet is the most common type of LAN ▫ Advantage: Fault Tolerant ▫ Disadvantage: lots of wires requires a "switch"

Network Reality Figure 7 -2 from textbook

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

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 ▫ Wi. Fi ▫ Bluetooth • Fiber Optic

• Which is better Cable or DSL? So • what doon. Iyour buy? It depends 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

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.

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

Internet History • 1969 - ARPAnet • 1973 - ARPAnet adds 1 st international nodes ARPAnet 1975 pic from som. csudh. edu (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

Current Number of Domains Last 24 Hours - Updated June 11, 2012 All New Deleted Transferred TLD 140, 697, 516 82, 549 105, 218 104, 126 All TLDs 103, 649, 756 59, 749 71, 871 74, 011 . COM 14, 787, 883 7, 590 10, 837 9, 777 . NET 9, 996, 547 4, 668 6, 119 5, 445 . ORG 8, 228, 889 7, 872 13, 126 11, 814 . INFO 2, 249, 488 1, 419 1, 679 1, 808 . BIZ 1, 784, 953 1, 251 1, 586 1, 271 . US http: //www. domaintools. com/internet-statistics/

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/farm 2. jpg

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October 2009 source: unknown

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

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.

A Non-Neutral Net http: //images. appleinsider. com/netneutrality 091808. png

Next Class • Debates • Ethics and Social Implications ▫ Do you have a right to privacy? ▫ How much does Choice. Point 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?