Acommon connection device that connects computers to a network and that sends messages (checks packets) between sender and receiver nodes is called a

switch

A switch is a piece of hardware and functions as a filter to check the packets of data being transferred on the network to which the switch is connected, but other than filtering and forwarding, the switch is not capable of much more. A switch network is more complicated than a hub, but it is not as complicated as a router. 

Answer the car to the left must yield the right of way to the vehicle on the right;