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Then we will discuss the current security problems with wireless networks and your options for dealing with them.
Last, we will present two methods that you can use to secure your wireless networks. These concepts will be the glue for our two recommended methods of secure wireless networking.
The physical layer contains different physical encoding mechanisms for wireless communications.
Bluetooth, 802.11x, CDMA, GSM, and 3G are different standards that define different methods to physically encode the data for transmission across the airwaves.
If you just cannot wait, the first method is a solution using an IPSec VPN located on (or behind) a dedicated firewall that separates the wireless network from an intranet.