Which network device provides a central point for connecting devices within a network and manages data traffic between them?

Several devices sit at the centre of a network, but they differ in what they actually do with the data passing through them. A router directs traffic between separate networks, such as a home network and the wider internet, and a modem converts signals so a network can connect to an internet service provider's line; neither one is primarily built to connect devices within one local network.

A hub also connects devices within a single network, but it is a very basic device: it simply repeats any incoming data out to every connected device, with no awareness of which device the data is actually meant for. A switch does the same central-connection job but manages the traffic intelligently. It reads the address information in each piece of data and sends it only to the specific device it is intended for, which reduces unnecessary traffic and collisions on the network. This targeted management of data traffic is why a switch, not a hub, is described as managing data traffic between connected devices.

When a question stresses that a device manages or directs traffic rather than just connecting devices, that description points to a switch rather than the more basic hub.