802.11b (Non-ERP)
Figure 6-6 802.11g Cell Using Protection: Part 4
Nearby APs that hear this beacon start to advertise:
NON_ERP present: no
Use Protection: yes
The nearby cell advertises NON_ERP present to indicate that it did not hear NON_ERP
devices, yet it advertises “Use Protection: yes” to be safe. This in effect forces the cell to
use protection even without 802.11b clients in that particular cell, thus degrading per-
formance for everyone in the cell. This is why APs have the option to use 802.11g only.
The 802.11a Protocol
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