Final answer:
A router is the device that examines and routes a packet based on its destination IP address, connecting multiple networks and determining the packet's best path.
Step-by-step explanation:
The type of device that looks at a packet and forwards it based on its destination IP address is a router. A router is designed to connect multiple networks together and route traffic between them. It examines the destination IP address contained in the packet's header, then uses a routing table to determine the best path for the packet to take to reach its destination. Unlike bridges or switches, which operate mainly within the same network, routers operate at a higher layer of the OSI model and can handle data packets between different networks, including the Internet.