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N10-005 · Question #306

N10-005 Question #306: Real Exam Question with Answer & Explanation

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

Explanation

802.11n is the only listed standard that supports dual-band operation on both 2.4GHz and 5GHz frequencies.

Common mistakes.

  • A. 802.11a operates exclusively on the 5GHz band and cannot use 2.4GHz.
  • B. 802.11b operates exclusively on the 2.4GHz band and cannot use 5GHz.
  • C. 802.11g operates exclusively on the 2.4GHz band and cannot use 5GHz.

Concept tested. 802.11n dual-band frequency support

Reference. 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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