Wi-Fi Question of the Day (QOTD)

As dictated by the Enhanced Distributed Coordination Access (EDCA) channel access method, what must an OFDM AP do before transmission of a downlink QoS voice data frame?

You must select 1 answer

Check the physical medium, using CCA, to ensure the medium is idle
Synchronize its clock with the heartbeat of the receiving station to ensure prioritized delivery
Wait a DIFS interval and a random backoff period to reduce the likelihood of collisions
Decrement its NAV value for each slot time that the medium is idle to decrement the timer while avoiding collisions
In sequence, select a backoff timer, count down slot times, perform CCA, then set the NAV to 0 to start sending the frame without collisions

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