Which of the following devices transmits data to all ports regardless of final destination?

A firewall inspects traffic based on rules and selectively blocks or permits packets, not flood all ports.

A router uses routing tables to forward packets only toward the specific destination network, not to all ports.

A switch maintains a MAC address table and forwards frames only to the specific port associated with the destination MAC address.

Hubs operate at OSI Layer 1 (Physical) and have no intelligence to inspect frame headers or MAC addresses. Every bit received on one port is immediately repeated out all other ports, meaning all connected devices receive all traffic regardless of the intended recipient. This flooding behavior creates collision domains and is why hubs have been replaced by switches in modern networks.