Which of the following Wi-Fi standards was introduced in the late 1990s?

The Wi-Fi standard that was introduced in the late 1990s is 802.11b. This standard was developed and ratified in 1999 and played a crucial role in popularizing wireless networking by providing higher speeds compared to its predecessors. It offered a maximum data transmission rate of 11 Mbps on the 2.4 GHz frequency, enabling a broader range of wireless applications and devices.

In contrast, 802.11a was also developed around that time, but it was ratified simultaneously with 802.11b and did not see widespread adoption until later due to its more complex implementation and higher frequency of 5 GHz, which resulted in less range compared to 802.11b. Meanwhile, 802.11g was introduced later in 2003 and combined the best features of both 802.11a and 802.11b, and 802.11n, which was developed in the following years, further improved on speed and range.

Understanding the historical context of these standards is important for comprehending the evolution of wireless technology and the significant impact of 802.11b in making Wi-Fi accessible and popular among users.