Which Of The Following Standards Apply To Wireless LAN Operation In The 5-GHz Band?

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Which of the following standards apply to wireless LAN operation in the 5-GHz band? Choose 3

The following standards apply to wireless LAN operation in the 5-GHz band:

IEEE 802.11a: This standard specifies the physical layer (layer 1) and media access control (MAC) layer (layer 2) of the OSI model for wireless LAN operation in the 5-GHz band. It supports data rates of up to 54 Mbps and is designed for use in high-density environments, such as office buildings and conference centers.
IEEE 802.11n: This standard builds on the 802.11a standard by adding support for multiple-input multiple-output (MIMO) technology, which allows for the use of multiple antennas to improve the range, capacity, and reliability of the wireless connection. It supports data rates of up to 600 Mbps and is designed for use in a variety of environments, including homes, offices, and public hotspots.
IEEE 802.11ac: This standard builds on the 802.11n standard by adding support for wider channels, more spatial streams, and higher data rates. It supports data rates of up to 6.9 Gbps and is designed for use in a variety of environments, including homes, offices, and public hotspots.

The following standards do NOT apply to wireless LAN operation in the 5-GHz band:

IEEE 802.11g: This standard specifies the physical layer (layer 1) and media access control (MAC) layer (layer 2) of the OSI model for wireless LAN operation in the 2.4-GHz band. It supports data rates of up to 54 Mbps and is designed for use in a variety of environments, including homes, offices, and public hotspots.
IEEE 802.11b: This standard specifies the physical layer (layer 1) and media access control (MAC) layer (layer 2) of the OSI model for wireless LAN operation in the 2.4-GHz band. It supports data rates of up to 11 Mbps and is designed for use in a variety of environments.