One of the feasible approaches to enhancing the network reliability is to detect and locate the fault in the time because once the failing source is located network administrator can repair the fault as soon as possible.

• 提高网络可靠性的一个主要方法就是及时诊断出网络工作时出现故障的位置以及具体原因，以便于网络管理人员尽快修复故障。