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What is the difference between IEEE 802.11 and IEEE 802.11b?

April 26, 2017difference ieee

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What is the difference between IEEE 802.11 and IEEE 802.11b?

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The main enhancement of the 802.11b was to standardize the physical layer support of two new speeds, 5.5 Mbps and 11 Mbps. DSSS had to be selected as the sole physical layer technique for the standard because frequency hopping cannot support the higher speeds without violating current FCC regulations. The 802.11b systems will interoperate with 1Mbps and 2 Mbps 802.11 DSSS systems, but will not work with 1 Mbps and 2 Mbps 802.11 FHSS systems.