N10-005 · Question #306
Which of the following can operate on BOTH the 2.4GHz and 5.8GHz frequencies?
The correct answer is D. 802.11n. 802.11n is the only listed standard that supports dual-band operation on both 2.4GHz and 5GHz frequencies.
Question
Which of the following can operate on BOTH the 2.4GHz and 5.8GHz frequencies?
Options
- A802.11a
- B802.11b
- C802.11g
- D802.11n
How the community answered
(24 responses)- B4% (1)
- C4% (1)
- D92% (22)
Why each option
802.11n is the only listed standard that supports dual-band operation on both 2.4GHz and 5GHz frequencies.
802.11a operates exclusively on the 5GHz band and cannot use 2.4GHz.
802.11b operates exclusively on the 2.4GHz band and cannot use 5GHz.
802.11g operates exclusively on the 2.4GHz band and cannot use 5GHz.
802.11n introduced dual-band capability, allowing devices to operate on either the 2.4GHz or 5GHz band. This flexibility was a key improvement over prior standards, which were locked to a single frequency range. Dual-band support allows 802.11n devices to avoid interference and improve compatibility.
Concept tested: 802.11n dual-band frequency support
Source: https://www.cisco.com/c/en/us/td/docs/wireless/controller/8-10/config-guide/b_cg810/wireless_device_access.html
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