Which IEEE 802.11 device family was connected by the added residential gateway capability?

• A. A, B, G
• B. B, G, N, and AC
• C. N, AC
• D. B/G Only

Answer: (B)

When evaluating a residential gateway, the goal is broad compatibility with devices that people actually use at home. That means supporting multiple IEEE 802.11 device families so both older and newer clients can connect without needing separate hardware.

A gateway that supports 802.11b (2.4 GHz, lower speed), 802.11g (2.4 GHz, higher speed than b), 802.11n (MIMO, can operate on 2.4 GHz or 5 GHz for much higher speeds and better range), and 802.11ac (5 GHz, very high throughput) covers the widest range of home devices. This combination ensures legacy devices can connect while still delivering modern performance for current devices. It also aligns with typical residential environments that use both 2.4 GHz and 5 GHz bands.

Including only some of these would leave older devices unsupported or limit newer devices, and leaving out the 802.11a family isn’t necessary in most home setups, since a gateway emphasizes b/g/n/ac compatibility rather than a.