关键词: 云计算, 安全域, 安全控制, 网络安全, 网络分割

Abstract: Security domain is a kind of effective method to improve the cloud computing cybersecurity. using network segmentation，cloud computing is divided into different security domains ,each security domain has the same characteristics and the unification of the resources of the protective security requirements,appropriate protective measures are deployed in the boundary of each security domain, so as to achieve the purpose of defense in depth.This paper analyzes the level of network security, gives the steps and elements of cloud computing security domain, and provides a typical security domain and control practice of cloud computing.

Key words: cloud computing, security domain, security control, cybersecurity, network segmentation