SNIA

A communications infrastructure element to which nodes on a multi-point bus or loop are physically connected.

Commonly used in Ethernet and Fibre Channel networks to improve the manageability of connecting devices to a bus structure, both managing physical cables and supporting the addition or removal of nodes from the bus while it is operating. Hubs maintain the logical loop topology of the network of which they are a part, while creating a "hub and spoke" physical star layout. Unlike switches, hubs do not aggregate bandwidth.

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