This paper analyzes the causes of computer virus epidemic in college campus network, gives a detailed account on how grouping defense and hierarchical management model can enhance the ability of computer virus defense and handling, and the ability to ensure that office working and teaching are carried out smoothly.

Dimensions of organizational immunity-based behavior have been explored on the basis of the definition and mechanism of organizational immunity,which include organizational recognition,organizational defense,and organizational memory.

Exploration of Layer Defence of Anti-ship Missile;