Layer 3 switches are generally used in large-scale networks, and how to set them up?

multilevel switching refers to the cascade between switches. . . . It means that multiple basic switches are cascaded up to the upper switch. . . .

the price of switch routers has come down, and this way is very common now. . . Large, medium and small networks can adopt this method. . . Many internet cafes are like this. . .

by network size, you mean the number of computers, right? It depends on the number of switches, interfaces and cascade layers. . .

it should be noted that not all switches can be cascaded. . . Many switches do not support cascading function. . . . ：）