Which feature of 802.11n wireless access points allows them to transmit data at faster speeds than previous versions of 802.11 Wi-Fi standards did?

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Which feature of 802.11n wireless access points allows them to transmit data at faster speeds than previous versions of 802.11 Wi-Fi standards did?

SPS
WPS
MIMO
MITM

Explanation: Multiple-input multiple-output (MIMO) technology allows 802.11n devices to use multiple antennas in order to increase the available bandwidth for the wireless network. Single Point Setup (SPS) is a Cisco technology that makes AP deployment easier by supporting clustering from a single management interface. Wi-Fi Protected Setup (WPS) is used to simplify connecting clients to secure wireless networks. Man-in-the-middle (MITM) is a type of security attack where the attacker attempts to insert themselves into the middle of a data stream.

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