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How Secure Is Your Wireless Network? Safeguarding Your Wi-Fi LAN by CCNA Lee Barken - CISSP MCP, CPA

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Summary

In this appendix, we reviewed the history of RF and electromagnetic waves, and the roles played by Hans Christian Oersted (discovery of electromagnetism), Michael Faraday (discovery of induction), Samuel Morse (discovery of conduction), and Heinrich Hertz (discovery of radio waves through air). Next, we reviewed modulation. Modulation techniques allow us to encapsulate a signal wave into a carrier wave in order to enhance the wave's propagation properties.

We reviewed AM, FM, and FSK, how antennae work, and the different types of antennae available.

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