what is hub?

In network terminology, a hub is a device where the entire connecting mediums come together. A hub is a medium used to collect signals from the input line(s) and redistribute them in various available wirings around a topology (topologies such as: 10base-T, 10base-F etc). Hub basically acts as signal splitter, it accepts signal through its input port and outputs it to the output ports. Some hubs help in regenerating the weak signals prior to sending them to the intended output lines, whereas some hubs help in synchronizing the data communication (in simple words, the hub not only provide the mean of interface within the network, it also provides some additional and useful features). Sometimes multiple hubs are interconnected in the network. Generally hubs are used more commonly where star topology is used. A hub is used in a wired network to connect Ethernet cables from a number of devices together. The hub allows each device to talk to the others.

types of hub:-
1.active hub
2.passive hub
3.intellectual hub