"High-Availability Network Design, Optimization, and Analysis"

尽管采取了相当大的努力来提供电缆的物理保护，但北美网络仍然经常遇到电缆切断和中断。对于用于基本语音或数据的更传统的网络类型，中断可能导致严重的财务损失。考虑到新兴网络旨在承载的许多应用的关键性质（医疗级应用、第一响应者应用等），失败的后果可能更为极端。然而，许多公共（甚至一些私人）网络的底层基础设施非常稀疏，这使得它们本质上无法生存，通常会出现单点故障。在这些情况下，跨度切割很容易导致网络的一部分与其余部分分离。

Despite considerable efforts taken to provide physical protection of cables, North American networks still experience frequent cable cuts and outages. For more traditional networks of the type used for basic voice or data, outages can result in severe financial losses. Given the critical nature of many of the applications that emerging networks are intended to carry (medical-grade applications, first responder applications, etc.), the consequences of failure could be much more extreme. And yet the very sparse nature of many public (and even some private) networks' underlying infrastructure makes them inherently un-survivable, often with single points of failure. In those cases, span cuts could easily result in one portion of the network being severed from the remainder.