Which Wi-Fi standard operates in the 2.4 GHz spectrum and can achieve speeds of up to 11 Mbps?

The Wi-Fi standard that operates in the 2.4 GHz spectrum and can achieve speeds of up to 11 Mbps is 802.11b. This standard was introduced in 1999 and marked a significant advancement in wireless networking technology by enabling higher data rates compared to its predecessors. The 802.11b standard specifically allows for a maximum throughput of 11 Mbps and uses the 2.4 GHz frequency band, which is prevalent for a wide range of devices and applications.

Other standards mentioned, such as 802.11a, operate in the 5 GHz frequency band with higher speed capabilities, offering up to 54 Mbps but not in the 2.4 GHz range. The 802.11n standard, on the other hand, further utilizes both the 2.4 GHz and 5 GHz bands with much greater speeds and improved reliability, providing theoretical speeds up to 600 Mbps under ideal conditions. The reference to "802" without a designation does not correspond to any specific Wi-Fi standard and lacks the details necessary to identify a particular technology.

Thus, 802.11b is the correct choice due to its specific operating frequency and maximum speed capabilities.