What is the main function of a router in networking?

• A. To access the internet
• B. To connect a single device to a network
• C. To connect multiple networks and forward packets between them
• D. To improve signal strength of internet connections

Answer: (C)

The primary function of a router in networking is to connect multiple networks and forward packets of data between them. Routers facilitate communication between different networks, such as connecting a home or office network to the internet. They direct data traffic, ensuring that packet data reaches its intended destination based on IP addresses. By doing so, routers can also manage traffic to optimize performance and help ensure security through various protocols and configurations.

In contrast, accessing the internet is a broader function that depends on the existence of a router among other components, and connecting a single device to a network is typically the role of a switch or modem, not a router. Improving signal strength is also not a primary function of a router; that role is usually fulfilled by devices such as range extenders or amplifiers.