In the 802.11 frame, what is the correct correspondence between Type and frame format in the Frame Control bit?

Question

Options

• AWhen Type is 01, it means data frame
• BWhen Type is 10, it means control frame
• CWhen Type is 00, it means reserved
• DWhen Type is 00, it means management frame

• A
  4% (1)
• B
  15% (4)
• C
  8% (2)
• D
  73% (19)

Explanation

In the 802.11 Frame Control field, the 2-bit Type subfield uses the value 00 to indicate a management frame, making option D correct. Management frames handle network operations like authentication, association, and beacons - they are foundational, so they take the lowest binary value, 00. Option A is wrong because 01 indicates a control frame (not data), and option B is wrong because 10 indicates a data frame (not control) - these two are simply swapped in the distractors. Option C is wrong because 00 is not reserved; the reserved value is 11 (binary), which is the only combination not assigned to a functional frame type.

Memory tip: Think of the values in ascending order of "action intensity" - 00 Management (overhead/admin), 01 Control (coordination), 10 Data (actual payload), 11 Reserved (unused). Management comes first at 00 because it must exist before any data can flow.

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