What function does a router perform?

• A. To store data permanently
• B. To direct data packets between networks
• C. To process and display web pages
• D. To protect against viruses

Answer: (B)

A router is a crucial device in networking that primarily directs data packets between different networks. It determines the best path for data to travel from the source to the destination across various networks, which may include both local networks and the internet. As devices send and receive data, the router helps to ensure that this data reaches its intended location efficiently and reliably.

By examining the functions of the other options, we can see why they do not fit the primary role of a router. For instance, the option regarding data storage pertains more to devices like hard drives or databases, which are designed to store data permanently. The function related to processing and displaying web pages is typically associated with web browsers and servers, which handle requests and render content for users. Finally, the option involving protection against viruses aligns more with the functions of antivirus software and firewalls, which are designed to safeguard devices from malicious attacks rather than managing the routing of data within networks.

In summary, the correct answer reflects the essential function of routers in guiding data traffic, while the other options relate to different aspects of computing and data management.