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Wireless Networks

The following topics are avaialable here under wireless networking. Click on the topic of your interest to read more. WiFi | WiMAX | RFID | BLUETOOTH | UWB | WIRELESS SECURITY

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I work on a SCADA system that basically uses a GPRS network to acquire data from remote sites. The 3rd party telecom company providing GPRS allots dynamic IP addresses to the remote devices. We use a cisco router at the perimeter for managing incoming traffic from these remote sites. In such a scenario where IP addresses change over time, how do I secure my SCADA hosts at the control center? I basically want to make sure that only the traffic coming from the remote sites is allowed into the LAN network of the control center.
Thanks
Khaled

hi..i'd like to know how do we get the fixed parameters of okumura-hata equation?as i'm doing my final year project on outdoor wireless over indoor wireless..tq