Because the switch has a high bandwidth internal switching matrix and back bus, and all ports are connected to this back bus, through the internal switching matrix, data packets can be directly and quickly transmitted to the destination node instead of all nodes, which does not waste network resources and thus generates very high efficiency. During this process, the security level of data transmission is very high, and it has been welcomed and widely praised by users.

Unlike hubs where each port shares the same bandwidth, switches have exclusive data bandwidth. Under this premise, within the same time period, the switch can transmit data to multiple nodes, and each node can enjoy a fixed portion of bandwidth as an independent network segment, so there is no need to compete with other devices for practical use.

The switch operates on the second layer of the OSI reference model, which is the data link layer. The CPU inside the switch will form a MAC table by mapping the MAC address to the port when each port is successfully connected. In future communication, packets sent to this MAC address will only be sent to their corresponding ports, not all ports. Therefore, switches can be used to partition data link layer broadcasts, i.e. conflict domains; But it cannot divide network layer broadcasting, that is, broadcasting domain.