Differents b/w hubs and switches

Hub

A common connection point for devices in a network. Hubs are commonly

used to connect segments of a LAN. A hub contains multiple ports. When

a packet arrives at one port, it is copied to the other ports so that all

segments of the LAN can see all packets.

Switch

In networks, a device that filters and forwards packets between LAN

segments. Switches operate at the data link layer (layer 2) and sometimes

the network layer (layer 3) of the OSI Reference Model and therefore

support any packet protocol. LANs that use switches to join segments are

called switched LANs or, in the case of Ethernet networks, switched Ethernet

LANs.