You don't need to draw lots for the right to choose the ball and the venue in the deciding game, but do you want to exchange venues?

The switch has a high bandwidth back-end bus and an internal switching matrix. All ports of the switch are connected to this standby bus. After the control circuit receives the data packet, the processing port will look up the address table in the memory to determine which port the NIC (network card) of the destination MAC (hardware address of the network card) is connected to, and quickly transmit the data packet to the destination port through the internal switching matrix. If the destination MAC does not exist, it will be broadcast to all ports. After receiving the response from the port, the switch will "learn" the new MAC address and add it to the internal MAC address table. Switches can also be used to "segment" the network. By comparing IP address tables, the switch only allows necessary network traffic to pass through the switch. Filtering and forwarding through the switch can effectively reduce the collision domain, but it cannot divide the network layer broadcast, that is, the broadcast domain. 1