In networking, a hub may be a little, simple, cheap device that joins multiple computers together.
Until the first 2000s, ethernet hubs were wide used for home networking due to their simplicity and low value. while broadband routers have replaced them in homes, hubs still serve a helpful purpose. Besides LAN, a number of different styles of networks hubs also exist as well as USB hubs.
Characteristics of ethernet Hubs
A hub is a rectangular box, usually manufactured from plastic, that receives its power from a normal wall outlet. A hub joins multiple computers (or different network devices) along to make one network section. On this network section, all computers will communicate directly with one another.
Ethernet hubs vary within the speed (network rate or bandwidth) they support. Original LAN hubs offered solely ten Mbps rated speeds. Newer styles of hubs further 100 Mbps support and typically offered each 10 Mbps and 100 Mbps capabilities (so-called dual-speed or 10/100 hubs).
The number of ports an ethernet hub supports also varies. Four- and five-port etherneta network|LAN} hubs are most typical in home networks, however eight- and 16-port hubs can be found in some home and small workplace environments. Hubs can be connected to each other to expand the full variety of devices a hub network will support.
Older ethernet hubs were relatively massive in size and generally noisy as they contained built-in fans for cooling the unit. modern hub devices are a lot of smaller, designed for quality, and quiet.
Passive, Active and Intelligent Hubs
Three basic types of hubs exist:
- Passive hubs don’t amplify the electrical signal of incoming packets before broadcasting them out to the network.
- Active hubs, on the opposite hand, do perform this amplification, as will a different style of dedicated network device known as a repeater. Some people use the terms concentrator when referring to a passive hub and multiport repeater when referring to an active hub.
- Intelligent hubs add further options to an active hub that are of particular importance to businesses. an intelligent hub generally is stackable (built in such the simplest way that multiple units can be placed one on top of the other to conserve space). Intelligent LAN hubs also typically include remote management capabilities via SNMP and virtual local area network (VLAN) support.
Working With ethernet Hubs
To network, a bunch of computers using associate ethernet hub, initial connect an ethernet cable into the unit, then connect the other end of the cable to every computer’s network interface card (NIC). All ethernet hubs settle for the RJ-45 connectors of standard LAN cables.
To expand a network to accommodate more devices, ethernet hubs also can be connected to every different, to switches, or to routers.
When an ethernet Hub is required
Ethernet hubs operate as Layer one devices in the OSI model. though hubs comparable practicality, nearly all thought LAN network equipment these days utilizes network switch technology instead, owing to the performance advantages of switches.
A hub are often helpful for quickly replacing a broken network switch or once performance is not a important issue on the network.