单项选择题

Toprovideefficientroamingbetweenthecells，whichpercentof……

To provide efficient roaming between the cells， which percent of cell overlap is recommended for2.4 GHz and 5 GHz access points？（）

A.5 to 10 percent for both 2.4 GHz and 5 GHz
B.10 percent for both 2.4 GHz and 5 GHz
C.20 percent for 2.4 GHz and 15 to 20 percent for 5 GHz
D.20 percent for 2.5 GHz and 10 percent for 5 GHz

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