The primary design goal is to limit the amount of traffic that requires routing in order to increase performance and reduce routing administration costs while maintaining wire - speed switching between end systems on the same logical subnet 其主要的設計目標是當在同一邏輯子網上保持終端系統(tǒng)之間的高速交換時,為了提高性能和減少路由的管理成本,限制需要路由的流量。