An administrator would like to get more speed out of a wireless network. The administrator decides to configure the AP with a frequency width of 40MHz. Which of the following features is the…

MIMO (Multiple Input Multiple Output) uses multiple antennas to transmit and receive several data streams simultaneously, improving throughput through spatial multiplexing rather than by widening the channel frequency.

AP isolation is a security feature that prevents wireless clients on the same access point from communicating directly with each other; it has no effect on channel width or network speed.

Channel bonding, defined in IEEE 802.11n and later standards, allows an access point to combine two adjacent 20 MHz channels into one 40 MHz wide channel. This doubles the data throughput by providing more spectral bandwidth, which is exactly what the administrator is configuring by setting the frequency width to 40 MHz.

Burst mode is a proprietary or vendor-specific feature that allows temporary exceedance of normal data rate limits for short intervals; it is not related to configuring a specific 40 MHz channel width on an AP.