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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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The History of Radio Frequency

Albert Einstein, when asked to describe radio, replied: “You see, wire telegraph is a kind of a very, very long cat. You pull his tail in New York and his head is meowing in Los Angeles. Do you understand this? And radio operates exactly the same way: you send signals here, they receive them there. The only difference is that there is no cat.”

The ability to propagate a signal from Point A to Point B without wires seems like a trivial occurrence in our modern day society filled with cell phones, TVs, and satellites. However, the scientific principles that enabled these discoveries are well over a century old. Wireless transmission and reception using electromagnetic waves began with the discovery of electromagnetism. ...

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