1引言分级保护是依据国家保密标准,针对涉及国家秘密的信息系统实际安全需求划分不同等级的安全保护域,重点是保证涉密信息不泄露。在分级保护项目建设中,方案设计是定策略、定措施的阶段,需要设计人员具有清晰的思路,开阔的眼界,同时还要对用户的网络现状、业务流程、未来规划有充分的了解。设计出 1 Introduction Classification protection is based on the national security standards for the actual security needs of the state secrets related to the actual security needs of the security level, the focus is to ensure that classified information is not disclosed. In the construction of graded protection project, the design of the plan is the stage of setting strategies and measures, which requires designers to have a clear idea and an open field of vision. At the same time, they should also have a full understanding of users’ current network conditions, business processes and future plans. Design