Blocking infection of network and it's diagnosing and analyzing

Blocking infection is a kind of state of network traffic. When blocking happens, how to determine its infected paths and area is extremely important to the developing of the network. This article gives a kind of definite arithmetic of infected paths of blocking, which can avoid or reduce the influence that blocking and infection does to the network. At the same time, this article has great practical importance in researching and developing the technology of network management.