Multi-granularity switch technologies decrease the complexity of optical cross connects by employing waveband routing and fiber routing techniques.
多粒度交换技术利用波带级路由以及光纤级路由，可有效降低光交叉连接器的复杂度。
The layer 3 switch technology which fits for the need of aggregation layer is a combination of the layer 2 switch technologies and routing.
三层交换技术将传统的二层转发和路由技术结合起来，特别适合汇聚层的需要。
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