What are the radio frequency bands used by IEEE 802.11 standards? (Choose two.)

A.
2.8 MHz

B.
2.4 GHz

C.
2.2 MHz

D.
5 GHz

E.
900 GHz

F.
900 MHz

Explanation:

Standard 802.11 – based wireless technologies take advantage of the radio spectrum deemed usable by the public. This spectrum is known as the Industrial, Scientific, and Medical (ISM) band. The 802.11 standard specifically takes advantage of two of the three frequency bands, the 2.4 GHz -to-2.4835 GHz UHF band used for 802.11b and 802.11g networks, and the 5.15 GHz-to-5.825 GHz SHF band used for 802.11a-based networks.
Reference: Cisco Courseware p.10-6