ROUTER
Router is a networking device which is used to send data packet to final destination
It is considered traffic cops of the Internet
It sends data in most efficient way.Its reads the destination address of data packet,calculate the best route and send packets toward its final destinaion.If the destination is on the same network as the sender computer ,the router sends the packet directly to the destination computer,if it not in the same network,the router instead sends the packet to another router closer to that network.
IP packets carries a segment that holds the maximum hops count it can travel,router reads that and send the packets without exceeding that predefined number of hops