Final answer:
Routers in Internet communication have the primary function of routing data packets and determining the most efficient path for them to reach their destinations.
Step-by-step explanation:
The primary function of routers in Internet communication is routing data packets. Routers are networking devices that examine the data packets and determine the most efficient path for those packets to travel across the network to reach their destinations.
When a data packet is sent over the Internet, it passes through multiple routers along the network backbone. Each router receives the packet, looks at the destination address, and makes a decision on how to forward it to the next router. This process continues until the packet reaches its final destination.
Routers play a crucial role in ensuring that data packets are delivered accurately and efficiently, contributing to the overall speed and reliability of Internet communication.