11B (NON-ERP) FIGURE 6-6 11G CELL USING PROTECTION

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