The main function of a switch is to forward and transmit data, achieving communication and interconnection between network devices. It can be summarized as the following functions:

Segmenting and isolating the network, dividing it into multiple virtual network segments, and improving network security.

Identify received data, accurately forward it to the target device, and improve network performance.

Control and manage traffic for different ports, users, and applications, optimize network environment, and improve network reliability and stability.

Optimize data transmission methods and improve transmission rates.

In addition to the basic functions mentioned above, switches also have some new features, such as support for VLANs (Virtual Local Area Networks), support for link aggregation, and even some have firewall functions.

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