H12-311_V3.0 · Question #53
The 802.11n standard uses dual frequency bands (2.4GHz and 5GHz), the theoretical transmission rate can reach up to 300Mbps, and the actual test rate can reach more than 100Mbps.
The correct answer is B. False. Option B is correct because the statement contains an error about the theoretical maximum transmission rate. While 802.11n does support both 2.4GHz and 5GHz bands, its theoretical maximum throughput is up to 600Mbps, not 300Mbps - achievable with four spatial streams (4x4 MIMO)…
Question
The 802.11n standard uses dual frequency bands (2.4GHz and 5GHz), the theoretical transmission rate can reach up to 300Mbps, and the actual test rate can reach more than 100Mbps.
Options
- ATrue
- BFalse
How the community answered
(24 responses)- A25% (6)
- B75% (18)
Explanation
Option B is correct because the statement contains an error about the theoretical maximum transmission rate. While 802.11n does support both 2.4GHz and 5GHz bands, its theoretical maximum throughput is up to 600Mbps, not 300Mbps - achievable with four spatial streams (4x4 MIMO) and a 40MHz channel width. The 300Mbps figure refers to a common two-stream configuration, not the standard's ceiling.
Option A is wrong because accepting the statement as true would mean accepting 300Mbps as the theoretical maximum, which understates the standard's actual capability.
Memory tip: For 802.11 standards, pair the letter with its max speed - 802.11n tops out at 600Mbps. If an exam says 300Mbps is the maximum for 802.11n, it is describing a mid-range configuration, not the standard's upper limit.
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