Which statement correctly describes the OSI layer and typical function of a switch versus a router?

• A. Switches operate at Layer 2 to forward frames using MAC addresses; routers operate at Layer 3 to route IP packets between networks.
• B. Switches operate at Layer 3 to route IP packets; routers operate at Layer 2 to forward frames.
• C. Switches operate at Layer 4 for port-based filtering; routers operate at Layer 7 for application awareness.
• D. Switches perform DNS resolution; routers perform DHCP.

Answer: (A)