300-360 · Question #76
When calculating bandwidth usage for an application, what two values represent the minimum and maximum 802.11 overhead per frame? (Choose two.)
The correct answer is C. 28 bytes F. 60 bytes. The 802.11 MAC frame header has variable size depending on which optional fields are present. The minimum 802.11 overhead is 28 bytes (Answer C): this consists of a 24-byte MAC header (Frame Control, Duration, three address fields, and Sequence Control) plus a 4-byte FCS (Frame…
Question
When calculating bandwidth usage for an application, what two values represent the minimum and maximum 802.11 overhead per frame? (Choose two.)
Options
- A16 bytes
- B24 bytes
- C28 bytes
- D48 bytes
- E56 bytes
- F60 bytes
- G64 bytes
How the community answered
(25 responses)- C96% (24)
- E4% (1)
Explanation
The 802.11 MAC frame header has variable size depending on which optional fields are present. The minimum 802.11 overhead is 28 bytes (Answer C): this consists of a 24-byte MAC header (Frame Control, Duration, three address fields, and Sequence Control) plus a 4-byte FCS (Frame Check Sequence). The maximum 802.11 overhead is 60 bytes (Answer F): this includes the 24-byte base MAC header, plus optional fields such as the fourth address field (6 bytes), QoS Control field (2 bytes), HT Control field (4 bytes), and other frame type-specific fields, totaling up to 60 bytes including FCS. Understanding this overhead range is important when calculating actual application throughput, since the true data payload capacity per frame is reduced by this overhead.
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