December 2019
Beginner
510 pages
12h 7m
English
Content preview from Networking Fundamentals
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IEEE 802.11n
While previous iterations of the Wi-Fi standards marginally improved with each release, IEEE 802.11n really leaped forward. To begin with, it supported both 2.4 GHz and 5 GHz, therefore, devices supporting it were usually dual-band. It also introduced the concept of Multiple-Input Multiple-Output (MIMO) antennas. Simply put, 802.11n devices usually had multiple antennas. Of those, all of them could send or all of them could receive, or most likely you would have some antennas transmitting or some receiving. All of these antennas could be used for communication with one or other or multiple devices, and you could even have some antennas working on one frequency, while the remainder worked on the other frequency.
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