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What is a switch? What is it for?

Switch (Switch) means “switch” and is a network device used for electrical (optical) signal forwarding. It can provide an exclusive electrical signal path for any two network nodes of the access switch. The most common switches are Ethernet switches. Other common ones are telephone voice switches, fiber switches and so on.

The main functions of a switch include physical addressing, network topology, error checking, frame sequence, and flow control. The switch also has some new functions, such as support for VLAN (Virtual Local Area Network), support for link aggregation, and some even have the function of firewall.

1. Like hubs, switches provide a large number of ports for cabling, allowing for cabling in a star topology.

2. Like repeaters, hubs, and bridges, a switch regenerates an undistorted square electrical signal as it forwards frames.

3. Like bridges, switches use the same forwarding or filtering logic on every port.

4. Like a bridge, the switch divides the local area network into multiple collision domains, each of which has an independent bandwidth, thus greatly improving the bandwidth of the local area network.

5.In addition to the functions of bridges, hubs, and repeaters, switches offer more advanced features such as virtual local area networks (VLANs) and higher performance.

What is a switch? What is it for?


Post time: Mar-17-2022