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Wireless LAN Implications, Problems, and Solutions

Chapter Description

When designing and supporting a WLAN, however, you must be aware of potential implications, such as security vulnerabilities, radio signal interference, multipath propagation, and other issues. This chapter from Designing and Deploying 802.11 Wireless Networks explains the impacts of these problems and introduces some ways to resolve them.


As this chapter explains, you must consider certain implications when designing, installing, and supporting a WLAN. It is imperative that you consider security vulnerabilities, such as passive monitoring, unauthorized access, and denial-of-service (DoS) attacks. Encryption and authentication, respectively, are ways to counteract passive monitoring and unauthorized access. The threat of a DoS attack is a bit more difficult to resolve, and it makes sense to have a “Plan B” in case the WLAN becomes inoperable, especially for mission-critical applications. Irregular propagation of radio signals through a facility and radio signal interference, coming from microwave ovens, cordless phones, and other devices, are unforeseen things that can reduce the performance of the WLAN. As a result, it is important to perform a wireless site survey before installing a WLAN. As part of deploying a WLAN, you also need to consider and possibly test for other implications, such as multipath propagation, roaming delays, battery limitations, and interoperability problems.

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