The objectives below mention spectrum analysis or information that can be gathered by viewing layer 1 using a spectrum analyzer. This post covers the information that you will be expected to know for the CWNA-107 and CWAP-403 exams. Specifically, knowing the environment you’re working in, what the potential interferers are, which of those can be removed, and how to work around those that cannot. If you don’t already understand Clear Channel Assessment (CCA) and energy detect, check out my post on Wireless Contention Mechanisms! Spectrum Analysis is a topic that frequently comes up when discussing troubleshooting.
All Wi-Fi devices that operate in both the 2.4GHz and 5GHz, and 6GHz in the future, must interoperate with other devices that use the same frequency. Wi-Fi operates at layer 1 (Physical) and 2 (Data Link) of the OSI model.
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