CS101.Lect10.WirelessNetworking.ppt

CS101.Lect10.WirelessNetworking.ppt - CS101 Lecture 09:...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Computer Science CS101 Lecture 09: Internetworking Radio AlohaNET WiFi Aaron Stevens ([email protected]) 26 September 2011 Computer Science What You’ll Learn Today What is radio? What are radio waves? What did that surfing professor dude create out in Hawaii? How do we measure the speed/performance characteristics of a network? What is WiFi? How secure is it?
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Computer Science What is Radio? Radio waves are electromagnetic radiation, which travel trough the air. Wave length is length (e.g. in meters) of a radio wave. Frequency is the number of occurrences of a repeating event per unit time (cycles per second, called Hertz.) Computer Science Electromagnetic Spectrum AM radio waves are about 100 meters FM radio/TV waves are about 1 meter Light waves are about 0.000005 meters
Background image of page 2
Computer Science How Radio Works Radio transmissions are sent from a transmitter to a receiver . Transmitter usually has a high-powered antenna; receiver usually uses low power antenna. Limited by power, line of sight
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/16/2011 for the course CS 101 taught by Professor Stevens during the Fall '08 term at BU.

Page1 / 8

CS101.Lect10.WirelessNetworking.ppt - CS101 Lecture 09:...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online