对数据中心和网络柜(net work closet)进行清理是一个不错的着手点。
Getting a walkthrough of the data center and network closets is a good start.
如果您所需要的是可伸缩性，则只需向单个数据中心增加更多的计算机和网络带宽等即可。
If all you want is scalability, just add more computers, network bandwidth, and so on, to a single data center.
从数据中心到用户的路径可能要经过多个网络和对等点。
The path from the data center to the user can traverse several networks and peering points.
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