Briefly explain the evolution of the wireless LAN protocols.?

Question

What will be an ideal response?

Answer 1

?Since the introduction of IEEE 802.11, other IEEE wireless LAN protocols have emerged. IEEE 802.11b, which was ratified in September 1999, can transmit data at a theoretical rate of 11 Mbps (due to noise, the actual rate is roughly one-half the theoretical) using 2.4-GHz signals. Many users who had found 802.11's data rate of 2 Mbps too slow were excited to see 802.11b products hit the market. Another name for 802.11b (as well as the other 802.11 wireless LAN standards) is Wi-Fi (wireless fidelity). IEEE 802.11g, introduced in 2002, transmits data at a theoretical rate of 54 Mbps using the same 2.4-GHz frequencies used in 802.11b. Also introduced in 2002 was IEEE 802.11a, which is capable of supporting a theoretical rate of 54-Mbps transmissions using the 5-GHz frequency range. As if all the IEEE protocols were not enough to remember, yet one more protocol for wireless LANs is worth mentioning. HiperLAN/2, a European standard, is also capable of transmitting data at a
theoretical 54 Mbps using the 5-GHz frequency range.
The newer wireless protocols do come with some disadvantages. The high 5-GHz frequency ranges used in IEEE 802.11a and HiperLAN/2 require so much power that laptops and portables have trouble delivering these signals for a useful amount of time. Second, the transmission distance for the higher frequency ranges is shorter than for the lower frequency ranges.