Deciding whether to go with a shared or switched fast LAN technology, once you start to max out your shared Ethernet or token-ring LAN, is a tough call.

• 一旦你开始要最大限度地发挥共享以太网或令牌环局域网的效用，决定是否用共享式还是交换式快速局域网技术便是一个棘手问题。