本文简要介绍了网络虚拟化的发展,分析了网络虚拟化方面的一些安全问题,并给出了一些可行的措施。经过多年的技术准备和商业模式探索,云计算已然进入快速发展的阶段。当前有不少大型数据中心和企业IT系统可为云计算提供设施级别的强大支撑平台,然而业务快速增加给数据中心和大型企业的复杂网络管理带来了极大的挑战。网络虚拟化技术和软件定义网络(SDN,Software Defined Networking)技术以软件可编程的方式管理 This article briefly introduces the development of network virtualization, analyzes some security problems in network virtualization, and gives some feasible measures. After years of technical preparation and business model exploration, cloud computing is already entering a phase of rapid development. Currently, there are many large data center and enterprise IT systems that provide a powerful platform for cloud computing at the facility level. However, the rapid increase in business poses a great challenge to complex network management in data centers and large enterprises. Network Virtualization and Software Defined Networking (SDN) technologies are managed in a software-programmable manner