Network switch
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A network switch is networking hardware that connects devices on a computer network by using packet switching to receive and forward data to the destination device.
Avaya ERS 2550T-PWR, a 50-port Ethernet switch
A modular network switch with three network modules (a total of 36 Ethernet ports) and one power supply
A five-port layer-2 switch without management functionality
A rack-mounted 24-port 3Com switch
Ethernet hub
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An Ethernet hub, active hub, network hub, repeater hub, multiport repeater, or simply hub is a network hardware device for connecting multiple Ethernet devices together and making them act as a single
Network switch
…without a collision domain. Switches also exist for other types of networks, including Fibre Channel, Asynchronous Transfer Mode, and InfiniBand. Unlike repeater hubs, which broadcast the same data out of each port and let the devices pick out the data addressed to them, a network switch learns the Ethernet addresses…
4-port 10BASE-T Ethernet hub with selectable MDI-X/MDI port
8-port Ethernet hub with one 10BASE2 connector and eight 10BASE-T ports