Which of the following are key standards for WLAN technology?

The correct answer highlights the key standards for Wireless Local Area Network (WLAN) technology, which are crucial for establishing wireless connectivity in local networks. The standards listed—802.11a, 802.11b, 802.11g, 802.11n, and 802.11ac—reflect the evolution of Wi-Fi technology and specify different frequencies, data rates, and methods of transmission that enhance network performance and reliability.

For instance, 802.11b was one of the first widely adopted standards, operating in the 2.4 GHz frequency band and offering speeds up to 11 Mbps. Following that, 802.11g also operates in the 2.4 GHz band but improves the data rate up to 54 Mbps. The 802.11n standard introduced Multiple Input Multiple Output (MIMO) technology, amplifying data rates significantly (up to 600 Mbps) and enhancing range. Lastly, 802.11ac operates in the 5 GHz band, further increasing throughput and supporting higher density of users.

Together, these standards represent the foundational technologies that allow for robust and flexible wireless networking, making them central to WLAN discussions. In contrast, the other options present a mix of unrelated IEEE standards