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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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Antenna Types

A variety of antenna types are available. Your choice will be driven by the needs of your particular application. Because antennae are working with a fixed amount of power generated by the system, antennae reshape their energy pattern in a specific direction. For example, a busy coffee shop requires a signal in all directions (but not directly above or below the AP); point-to-point applications require highly directional antennae that focus all of the energy in one particular path.

To put it another way, you can think of antennae as sources of light. When faced with the choice of using a flashlight or a fluorescent bulb, you must understand if the application involves lighting up a hiking trail at night or a department store aisle. ...

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