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2U hub / switch

A network switch (sometimes known as a switching hub) is a computer networking device that is used to connect devices together on a computer network by performing a form of packet switching. A switch is considered more advanced than a hub because a switch will only send a message to the device that needs or requests it, rather than broadcasting the same message out of each of its ports. [Network switch. Wikipedia]
2U hub / switch
2U hub / switch, 2U hub switch,