Refer to the exhibit.
An MSM APis operating in 802.11n mode, and legacy (a/g) traffic is being transmitted on the same
radios as the 802.11n traffic. Which Advanced wireless setting prevents collisions from legacy
traffic?
A.
Tx beamforming
B.
Guard interval
C.
Multicast Tx rate
D.
Tx protection
D
Tx protection
When an AP is operating in an 802.11n mode, and legacy (a/b/g) traffic is present on the same
channel as 802.11n traffic, this feature can be used to ensure maximum 802.11n throughput.
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legacy 802.11b clients cannot
detect the High Throughput (HT) rates that 802.11n uses. So to avoid causing excessive
collisions, 802.11n clients must use the same protection mechanisms when a legacy client is
present. Even the most efficient protection mechanism (CTS-to-self) causes a substantial
decline in throughput; performance can decline by as much as 50 percent. For this reason, the
protection behavior of the E-MSM430, E-MSM460, and E-MSM466 can be configured Tx
protection to allow network administrators greater flexibility over their
deployments.
Answer: D
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D
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