What capability was added to residential gateways to connect to IEEE 802.11b-, 802.11g-, 802.11n-, and 802.11ac-compliant devices?

• A. Bluetooth only
• B. Ethernet-only
• C. No wireless support
• D. Wireless capability

Answer: (D)

The capability being tested is the gateway’s wireless capability, meaning it includes a Wi‑Fi radio and supports 802.11b/g/n/ac to connect with wireless devices. This addition turns the gateway into a Wi‑Fi router/access point, letting laptops, phones, and other devices communicate over the wireless network across those standards. Without wireless capability, a gateway would only use wired Ethernet and could not connect to Wi‑Fi devices. Bluetooth-only would restrict to Bluetooth peripherals, not Wi‑Fi networks; Ethernet-only or no wireless support would likewise prevent any wireless connections. The wireless capability is what enables compatibility with the various 802.11 standards and lets devices connect wirelessly.