Desired Monitoring and Intrusion Protection Functionality

Your decisions about sensor placement should also take into account what functionality you plan to use. Five important functions that are dependent on sensor density or placement are:

• WEP Cloaking—For effective WEP Cloaking, several sensors should be deployed around the perimeter of a building. Higher sensor density will typically yield better protection for your legacy encryption devices.
• Location Tracking—To track a device, the device must be observed by three or more sensors on the same floor plan. Higher sensor density will typically yield more accurate results.
• Connection Termination—To terminate a devices connection to your network, the device must be in range of a sensor sending termination signals.
• Policy Enforcement—To ensure adherence to policies or to detect attacks against managed devices, sensors must be able to receive a representative sampling of traffic sent by all devices they are monitoring.
• Rogue Detection—iEven sporadic emanations from wireless clients and s can reveal the presence of rogues. You need to place sensors where transmissions from rogue devices can be detected as soon as they enter the scanning area.