its for multiplying one usb out to numerous outs
humming universal bus
Universal Serial Bus. Each independent bus can connect to up to 128 devices, however remember that each hub counts as at least 1 device.
For most printers, yes. Most printers have more than one interface, two of the most common are network and USB (Universal Serial Bus). Documents can be sent by either of these methods, and still have the same result. However, some large office machines (many of the products from Ricoh and Xerox) can only be connected through a network.
The primary function of the Ethernet hub is to connect the different cable segments. ...
Theoretically, you can use a USB port to connect up to 127 devices. To do so, you would need to use hubs. The problem with using hubs is that they count as devices. Thus if a hub has 4 sockets, it counts as 5 of the 127 devices.
Local I/O Bus
the bus
A star topology has a central hub with other devices each connected to the hub but not to each other - for one device to communicate to another, they have to use the hub. With a bus topology all the devices are connected to the same bus - there is no hub. Each topology has advantages and disadvantages; the speed of a star network is limited by the hub; a telephone exchange is an example of a star network and there is a built-in limit to the number of devices that can be connected and there's no way to increase it other than to replace the hub with a bigger one. However, the devices (telephones in our example) can be dumb - all the intelligence is in the hub; it manages the calls and importantly, for commercial exchanges, calculates the bills. For bus networks, devices have to be smarter but can do much more as they can grab the whole bus.
hub
function as a repeater
Local I/O bus.
The north and south bridge refer to the data channels to the CPU. The memory goes to CPU using the north bridge. And the mouse, keyboard, CD ROM, HDD, ext data flows to the CPU using the southbridge. The northbridge is the portion of the chipset HUB that connects faster I/O buses (for example, an AGP bus) to the system bus. Northbridge chip tends to be larger than the southbridge chip. The southbridge is the HUB that connects to slower I/O buses (for example, an ISA bus) to the system bus. The Northbridge and the Southbridge are known as the chipset on the motherboard. These set of chips collectively control the memory cache, external bus, and some peripherals. There is a fast end of the hub, and there is a slow end of the hub. The fast end of the hub is the Northbridge, containing the graphics and memory controller connecting to the system bus. The slower end of the hub is the Southbridge, containing the I/O controller hub.