What is the primary function of a router in a network?

The primary function of a router in a network is to establish paths for data packets. Routers work by receiving incoming data packets, analyzing their destination addresses, and determining the most efficient route for them to travel across various networks. This function involves directing traffic between different networks, ensuring that data packets reach their intended destinations accurately and efficiently.

By forwarding data between devices within the same network as well as between different networks, routers play a crucial role in maintaining connectivity and communication across the internet and local networks. Without routers, the seamless exchange of data and communication between different devices and networks would not be possible.

In contrast, the other options focus on tasks that are not the primary responsibility of a router. Compiling and executing code is related to software development and programming environments, while backing up data securely involves storage solutions and practices that are not performed by routers. Scanning for viruses is a function associated with security software, not with routing data.