Data is typically carried to their datacenters on public telecoms networks and navigates a number of central processing systems ( built on complex routed and switched networks ) before being stored in centralized databases ( see figure 3 ) 在存储到中心数据库之前，数据首先通过公共通信网络导向几个中心处理系统（建立在复杂的路由和交换网络之上） 。
