To effectively troubleshoot a network, a baseline must first be established. The baseline information will be included in the network documentation. This module discusses the basic requirements for establishing a baseline and creating a coherent set of network documentation.
三军未动,粮草先行!想要有效的对网络排错,第一就是要做基准线.这个基准线当然也要包含在网络文档里.本节就讨论建立基准线的基本要素和创建立一个以之相关的网络文档.

Some of the biggest challenges facing the IT world are the expenses incurred as a result of network outages. The negative impact of these expenses makes it a high priority of network professionals to be able to diagnose and correct a network problem as efficiently as possible. To assist in accomplishing this, a baseline must be established to provide a snapshot of the configuration of a network while it is performing at an acceptable level. Using baseline information as a standard reduces the time that a troubleshooter needs to spend learning about the structure and configuration of the network. It also helps troubleshooters know when they have reached the goal of returning the network to its baseline level. Without a baseline, troubleshooters have to make guesses and estimates about whether they have reached their goal. Troubleshooting in this manner is haphazard and inefficient.

IT的最大挑战,就是面对网络故障时所带来的巨大损失.这些损失的不利影响,促使网络高手们把尽可能有效的诊断和纠正网络问题变成自己至关重要的工作.为了达成这个目的,就需要把网络运行在可接受水平时的情况做成基准线,以做为当前网络配置情况的快照.通过基准线这个标准,我们就可以大大减少在排错时去了解网络结构和配置情况的时间.并且,它也可以帮助排错者确认网络是否恢复到基准线水平.如果没有这个东东,排错就会像无头的苍蝇一般在那瞎猜网络是否正常了．这个时候的排错，就变的具有太大的随机性和效率低下．

呵呵，只能看懂一半，中文的如一半！