Final Answer:
The power management mode that populates a Traffic Indication Map (TIM) in a basic or extended service set is Power save polling (PSP) mode. Option A is the answer.
Step-by-step explanation:
In Wi-Fi networks, Power Save Polling (PSP) mode is a power management mechanism where stations (client devices) periodically wake up to check for buffered frames at the access point. The Traffic Indication Map (TIM) is a component of this mechanism and is used to indicate to sleeping stations whether there are frames buffered for them. When a station wakes up in PSP mode, it consults the TIM to determine if there are any pending frames. This allows the station to conserve power by only waking up when there is data awaiting transmission, reducing overall energy consumption in the network.
Option A is the answer.