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I was reading on page 175 of the CWAP study guide and came up with a question. In figure 6.23 it shows 10 of 16 bits being used, with the other 6 being reserved. In figure 6.22, it shows a capture focusing in on capability info. There are 11 fields (instead of 10) being shown. The added field is "spectrum management". Can someone explain what the "spectrum management" bit is, and if it is now part of a standard or is a specific manufacturer using a reserved bit for something proprietary? Thank you in advance for the help!

GT Hill

Hi GT:

Spectrum Management became part of the IEEE 802.11 standard in 2003 when the 802.11h amendment was ratified.

Abstract: This amendment specifies the extensions to IEEE 802.11?¡é???¡é for wireless local area networks (WLANs) providing mechanisms for dynamic frequency selection (DFS) and transmit power control (TPC) that may be used to satisfy regulatory requirements for operation in the 5 GHz band in Europe.

After that there have been but five bits reserved in the Capability Information Field. The proposed 802.11e amendment draft 13 leaves but one bit reserved.

I hope this helps. Thanks. /criss

That helps a lot. Thanks again Criss!

GT Hill