Which IEEE 802.11 amendment defines mechanisms for APs and clients to dynamically measure available radio resources?

Which IEEE 802.11 amendment defines mechanisms for APs and clients to dynamically measure available radio resources?

• A. 802.11a
• B. 802.11b
• C. 802.11k
• D. 802.11g

Answer: (C)

Radio resource measurement between APs and clients is defined by 802.11k. This amendment introduces mechanisms for the wireless devices to actively measure the environment and report the results, enabling dynamic assessment of available resources. Through Measurement Request and Measurement Report exchanges, an AP or a client can gather data such as channel utilization, received signal strength (RSSI), noise levels, and other radio-environment metrics. This information helps determine which channels are less congested, when to roam to a different AP, or how to balance load more effectively across the network. The other amendments listed focus on different aspects—older PHY specifications define modulation and data rates, while others address QoS or compatibility—not on providing a formal framework for ongoing radio-resource measurements.

Radio resource measurement between APs and clients is defined by 802.11k. This amendment introduces mechanisms for the wireless devices to actively measure the environment and report the results, enabling dynamic assessment of available resources. Through Measurement Request and Measurement Report exchanges, an AP or a client can gather data such as channel utilization, received signal strength (RSSI), noise levels, and other radio-environment metrics. This information helps determine which channels are less congested, when to roam to a different AP, or how to balance load more effectively across the network. The other amendments listed focus on different aspects—older PHY specifications define modulation and data rates, while others address QoS or compatibility—not on providing a formal framework for ongoing radio-resource measurements.