Which device is used to connect two or more LANs at the MAC layer to extend wireless coverage?

Which device is used to connect two or more LANs at the MAC layer to extend wireless coverage?

• A. Wireless modem
• B. Dipole antenna
• C. Yagi antenna
• D. Wireless bridge

Answer: (D)

Connecting two LANs at the MAC (Data Link) layer means forwarding frames between them as if they were one network, over a wireless link. A wireless bridge performs this function, effectively linking separate LAN segments and extending wireless coverage by bridging them at Layer 2. It takes frames from one LAN, relays them over the wireless link, and presents the other side as a single, connected network. The other options don’t fit this role. A wireless modem is used to access the Internet, not to interconnect LANs. Dipole and Yagi antennas are used to transmit or receive radio signals and extend coverage, but they don’t by themselves connect two LANs or perform MAC-layer bridging; they require a device to bridge the networks.

Connecting two LANs at the MAC (Data Link) layer means forwarding frames between them as if they were one network, over a wireless link. A wireless bridge performs this function, effectively linking separate LAN segments and extending wireless coverage by bridging them at Layer 2. It takes frames from one LAN, relays them over the wireless link, and presents the other side as a single, connected network.

The other options don’t fit this role. A wireless modem is used to access the Internet, not to interconnect LANs. Dipole and Yagi antennas are used to transmit or receive radio signals and extend coverage, but they don’t by themselves connect two LANs or perform MAC-layer bridging; they require a device to bridge the networks.