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IEEE 802.11b is an amendment to the 802.11 standard for wireless LANs. It is of of the specifications that is more commonly known as Wi-Fi.
802.11b uses the same unregulated radio frequency band of 2.4 GHz that was used by the original 802.11 standard, but operates at theoretical data throughput of 11 Mbps. 801.11.b was rolled up into 802.11-2007 along with amendments a, b, d, e, g, h, i, and j.
This term is also known as IEEE 802.11b-1999