What function does a hub perform in an Ethernet network?

A hub serves as a basic connection point in an Ethernet network by allowing multiple devices to communicate with one another. Its primary function is to connect devices within the same local area network (LAN) without performing any filtering or processing of the data being transmitted. This means that when a device sends a data packet, the hub broadcasts that packet to all connected devices. This lack of intelligence means that the hub does not differentiate between the devices; all traffic goes to all ports, which can lead to collisions and increased network congestion.

This behavior is in stark contrast to more advanced devices like switches, which can intelligently direct traffic to specific destinations, thus enhancing network efficiency and performance. Hubs are generally considered outdated technology because they do not provide the same level of performance, security, or management capabilities as switches.