Which of the following is a Layer 3 device that will typically drop directed broadcast traffic?

Hubs are Layer 1 (Physical layer) devices that repeat electrical signals to all ports without inspecting any packet headers and have no ability to filter IP broadcast traffic.

Bridges are Layer 2 (Data Link layer) devices that forward frames based on MAC addresses and cannot inspect or filter Layer 3 IP directed broadcast addresses.

Routers operate at Layer 3 (Network layer) and inspect IP headers, which allows them to identify and drop directed broadcast packets (those addressed to a subnet's broadcast address). RFC 2644 updated the default router behavior to discard directed broadcasts rather than forward them, preventing smurf-style DDoS amplification. Layer 1 and Layer 2 devices lack IP header awareness and cannot make this filtering decision.

Switches are primarily Layer 2 devices that make forwarding decisions based on MAC address tables and do not inspect IP headers to filter directed broadcasts by default.