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What is true of the two lower bands (UNII-1 and UNII-2) in this frequency spectrum?

The IEEE 802.11a/n physical layer technologies utilize the 5 GHz frequency band. What is true of
the two lower bands (UNII-1 and UNII-2) in this frequency spectrum? (Choose two)

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A.
The frequency range of these bands is 5000 MHz – 5200 MHz

B.
Each of these two bands contain five 20 MHz channels.

C.
Regulatory domains worldwide require DFS and TPC in these bands.

D.
These bands have a total combined bandwidth of 200 MHz.

E.
20 MHz in each of these bands is reserved as a guard band.

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