Combo means a small jazz band; a small dance band; a mixture, especially of food.
Combo also refers to photoelectric multiplexing. Combo port refers to two Ethernet ports (usually one is optical port and the other is electrical port) on the switch equipment panel, while there is only one forwarding port inside the equipment. Combo port and its corresponding optical port are optically multiplexed in logic. Users can choose one of them according to the actual networking situation, but they can’t work at the same time. When one of the ports is activated, the other port is automatically disabled.