在安装多个入侵侦测系统和多重路由器来袭交通，以减少呛点。
Install multiple intrusion-detection systems and multiple routers for incoming traffic to reduce choke points.
这种结构很浪费：各业务部门产生了很多重复工作，开发相类似的路由器就是一个例子。
This had become wasteful: the lines of business duplicated a lot of work, for instance by developing similar routers.
通过在物理层之上的逻辑层中定义路由，可以在相同网络结构上实现许多重叠的拓扑。
With routing defined in a logical layer above the physical network, it is possible to have many overlapping topologies implemented on the same network fabric.
它仍缺少许多重要的特征如安全和路由。
It still misses many important features like security and routing.
它仍缺少许多重要的特征如安全和路由。
It still misses many important features like security and routing.
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