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

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Presentation transcript:

Networks MGMT 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 NetworkToken Ring

Common LAN Topology Star Network ▫Ethernet ▫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 ▫WiFi ▫Bluetooth Fiber Optic

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

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 ARPAnet ARPAnet adds 1 st international nodes (London and Norway) first application DNS introduced with 1000 nodes First web server birth of Google Inc million domains million domains ARPAnet 1975 pic from som.csudh.edu

Current Number of Domains AllNewDeletedTransferredTLD 140,697,51682,549105,218104,126All TLDs 103,649,75659,74971,87174,011.COM 14,787,8837,59010,8379,777.NET 9,996,5474,6686,1195,445.ORG 8,228,8897,87213,12611,814.INFO 2,249,4881,4191,6791,808.BIZ 1,784,9531,2511,5861,271.US Last 24 Hours - Updated June 11, 2012

How to create your own domain Register an IP Address and Name with ICANN or use a Server Farm

14 / 13

October 2009 source: unknown

How Info Moves on the Internet Routing of Packets TCP / IP Comporium mon-cre Steve 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

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?