What does a “switch” do? how to use?

1. Know the switch

From the function: the switch is used to connect multiple devices, so that they have the conditions for network interoperability.

By definition: a switch is a network device that can connect multiple devices to a computer network and forward data to a destination through packet switching.

2. When to use the switch

Let’s take a look at this simple data exchange scenario. If there is a need for data exchange (communication) between two devices, we only need to use a network cable to connect the network ports of the two devices; after setting the MAC address of the device , can realize data exchange.

3.the connection of the switch

At present, there are two longest connection lines: twisted pair (network cable) and optical fiber; the connection methods can be divided into: terminal connection switch, switch connection switch, connection between switch and router, switch cascade, switch stack, link aggregation, etc.