The 802.11-2007 standard includes which two amendments to the original 802.11 standard? (Choose two.)
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A. B. C. D. E.BC.
The 802.11-2007 standard is the second revision of the original 802.11 wireless networking standard. It includes several amendments to the original standard, two of which are:
B. 802.11d: This amendment introduced the concept of Dynamic Frequency Selection (DFS) and Transmit Power Control (TPC) for wireless networks operating in the 5 GHz frequency band. DFS allows devices to detect and avoid interference from radar systems operating in the same frequency band, while TPC enables devices to adjust their transmit power based on the surrounding environment, which helps to improve network performance and reduce interference.
C. 802.11j: This amendment provides additional regulatory requirements and extensions for wireless networks operating in Japan. It includes new frequency channels, power limits, and other features specific to the Japanese market.
The other amendments listed in the answer choices are:
A. 802.11c: This amendment defines the Bridge Management Information Base (MIB) for wireless bridges.
D. 802.11r: This amendment defines Fast Basic Service Set Transition (FT) for fast roaming between Access Points (APs) in a wireless network.
E. 802.11u: This amendment provides enhancements for wireless networks operating in unlicensed spectrum bands, including the ability to discover and connect to network services using standardized protocols.
In summary, the two amendments included in the 802.11-2007 standard are 802.11d (for dynamic frequency selection and transmit power control) and 802.11j (for additional regulatory requirements in Japan).