Switches manage the flow of data across a network by transmitting a received network packet only to the one or more devices for which the packet is intended. Multiple data cables are plugged into a switch to enable communication between different networked devices.
Ĭisco small business SG300-28 28-port Gigabit Ethernet rackmount switch and its internalsĪ switch is a device in a computer network that connects other devices together. 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 identities of connected devices and then only forwards data to the port connected to the device to which it is addressed. Switches also exist for other types of networks including Fibre Channel, Asynchronous Transfer Mode, and InfiniBand. The first Ethernet switch was introduced by Kalpana in 1990. Switches for Ethernet are the most common form of network switch. Such switches are commonly known as layer-3 switches or multilayer switches. Some switches can also forward data at the network layer (layer 3) by additionally incorporating routing functionality.
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Avaya ERS 2550T-PWR, a 50-port Ethernet switchĪ network switch (also called switching hub, bridging hub, and, by the IEEE, MAC bridge ) is networking hardware that connects devices on a computer network by using packet switching to receive and forward data to the destination device.Ī network switch is a multiport network bridge that uses MAC addresses to forward data at the data link layer (layer 2) of the OSI model.
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