Which device is a half-duplex device that only provides Layer 2 connectivity?

• A. Access Point
• B. Router
• C. Switch
• D. Wireless bridge

Answer: (D)

Bridging two LANs at the Data Link layer over a wireless link. A wireless bridge forwards frames based on MAC addresses between two network segments and does not route IP traffic, so it provides Layer 2 connectivity only. The wireless medium is shared, so the radio operates in half-duplex—transmit or receive at any moment, not both. That combination—Layer 2-only operation and a half-duplex wireless link—fits a wireless bridge. An access point connects wireless clients to a wired network but isn’t inherently a two-segment bridge; a switch is a Layer 2 device but typically supports full-duplex wired connections; a router operates at Layer 3 and handles IP routing.