The IEEE 802.11-2007 standard requires ERP capable devices to be backward compatible with
devices using which other 802.11 physical layer specifications (PHYs)? (Choose two)
A.
DSSS
B.
FHSS
C.
HR/DSSS
D.
ERP-PBCC
E.
DSSS-OFDM
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Correct answer is AC
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