What is the frequency range of the IEEE 802.11b standard?

What is the frequency range of the IEEE 802.11b standard?

• 24Gbps
• 5GHz
• 2.4GHz
• 5Gbps 

 

EXPLANATION

802.11b boasts an impressive performance. It is able to transfer data with raw data rates up to 11 Mbps, and has a good range, although not when operating at its full data rate.

Summary of 802.11b Wi-Fi Standard Specification
Parameter	Value
Date of standard approval	July 1999
Maximum data rate (Mbps)	11
Typical data rate (Mbps)	5
Typical range indoors (Metres)	~30
Modulation	CCK (DSSS)
RF Band (GHz)	2.4
Channel width (MHz)	20

When transmitting data 802.11b uses the CSMA/CA technique that was defined in the original 802.11 base standard and retained for 802.11b. Using this technique, when a node wants to make a transmission it listens for a clear channel and then transmits. It then listens for an acknowledgement and if it does not receive one it backs off a random amount of time, assuming another transmission caused interference, and then listens for a clear channel and then retransmits the data.