Which two WLAN standards operate at the 2.4 GHz frequency?

Which two WLAN standards operate at the 2.4 GHz frequency?

• A. 802.11b and 802.11n
• B. 802.11a and 802.11g
• C. 802.11b and 802.11g
• D. 802.11ac and 802.11g

Answer: (C)

The correct choice identifies 802.11b and 802.11g as WLAN standards that operate at the 2.4 GHz frequency. Both of these protocols are part of the IEEE 802.11 family, which governs wireless networking standards. 802.11b, introduced in 1999, was one of the first Wi-Fi standards widely adopted for home networking. It operates in the 2.4 GHz band and supports speeds of up to 11 Mbps. The 2.4 GHz band is favored for its good range and ability to penetrate walls, although it is often subject to interference from other devices like microwaves and cordless phones that share the same frequency. 802.11g released later in 2003, also operates in the 2.4 GHz band and provides higher data rates, up to 54 Mbps, by utilizing a modulation technique called OFDM (Orthogonal Frequency Division Multiplexing). It maintains backward compatibility with 802.11b, which means devices conforming to 802.11b can connect to networks utilizing 802.11g. Other options include standards that do not operate at 2.4 GHz. For instance, 802.11a operates in the 5 GHz range and

The correct choice identifies 802.11b and 802.11g as WLAN standards that operate at the 2.4 GHz frequency. Both of these protocols are part of the IEEE 802.11 family, which governs wireless networking standards.

802.11b, introduced in 1999, was one of the first Wi-Fi standards widely adopted for home networking. It operates in the 2.4 GHz band and supports speeds of up to 11 Mbps. The 2.4 GHz band is favored for its good range and ability to penetrate walls, although it is often subject to interference from other devices like microwaves and cordless phones that share the same frequency.

802.11g released later in 2003, also operates in the 2.4 GHz band and provides higher data rates, up to 54 Mbps, by utilizing a modulation technique called OFDM (Orthogonal Frequency Division Multiplexing). It maintains backward compatibility with 802.11b, which means devices conforming to 802.11b can connect to networks utilizing 802.11g.

Other options include standards that do not operate at 2.4 GHz. For instance, 802.11a operates in the 5 GHz range and