what is meant by IT hubs
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A hub, also called a network hub, is a common connection point for devices in a network. Hubs are devices commonly used to connect segments of a LAN. The 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.
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Air travel: Strategically located airport or city where a carrier's major facilities and operations are housed, and where most of its scheduled flights originate from or terminate at.
Computer networking: Electronic device that works as a central connecting point for multiple computers in a network. Types of hubs include (1) Passive hubs which only split the transmission signal so that more computers can be added to the network, (2) Active hubs (also called Multiport Repeaters) regenerate data bits to maintain a strong signal over extended cable lengths, and (3) Intelligent hubs (also called Concentrators) usually have their own microprocessor chips and network operating systems.