Which of the following computer devices 1-5 are computer networking devices only? Choose the correct answer from the options given below:

Networking devices are those whose sole role is to connect and direct traffic between computers on a network.

The Hub is purely a networking device that broadcasts incoming data to all connected ports.

The Switch is purely a networking device that forwards data intelligently to the intended destination port.

The Router is purely a networking device that connects different networks and routes packets between them.

CD-RW is a storage medium, not a networking device, so it is excluded.

A Hard Disk is a storage device for data, not for networking, so it is excluded.

The networking-only devices are therefore the Hub, Switch and Router.