Which networking device contains several ports, each with its own collision domain, and checks the incoming packet's header to identify which port the packet is forwarded to?

Switches enable centralized LAN connectivity. Switches inspect the header of incoming packets and route them to just the port whose associated media access control (MAC) address matches the receiving MAC address in the header. Hubs are rarely utilized nowadays days since the entire hub is one collision domain, and when a packet is received, the hub transmits it to all of its ports indiscriminately. Bridges connect different networks to make them work as one, while routers forward data from one network to another.