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What are the main functions of the switch? Many novices are not very clear about this. In order to help you solve this problem, the following editor will explain it in detail. People with this need can come and learn. I hope you can gain something.

The three main functions of the switch are learning, forwarding and filtering, and eliminating loops. Learn that the switch knows the MAC address of the device connected to the port and maps the address to the corresponding port and stores it in the address table; forwarding filtering, when the destination address of a data frame is mapped in the MAC address table, it will be forwarded to the port of the connected destination node.

The three main functions of the switch are: learning to forward, filter and eliminate loops.

Three main functions:

(1) Learning: the Ethernet switch knows the MAC address of the device connected to each port, and maps the address to the corresponding port and stores it in the MAC address table in the switch cache.

(2) forwarding / filtering: when the destination address of a data frame is mapped in the MAC address table, it is forwarded to the port of the connected destination node instead of all ports (all ports if the data frame is a broadcast / multicast frame)

(3) eliminate loops: when the switch includes a redundant loop, the Ethernet switch avoids the generation of loops through spanning tree protocol and allows the existence of backup paths.

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