虚拟计算环境中的虚拟网络

虚拟计算环境是近年来的学术研究热点，而虚拟网络是构成虚拟计算环境的核心技术。本文介绍了主流的虚拟网络构成原理和虚拟网络实现技术，分析了虚拟计算环境中虚拟网络的特点，总结并提出了虚拟网络的性能开销、QoS、自适应和安全性等开放性问题。

Virtual Networks in Virtual Computing Environments

Recently,virtual computing environment has become a hot research topic in computer science.Virtual network is one of the key techniques for establishing virtual computing environments.What are introduced in this paper are the principle and technologies of establishing virtual networks.Finally,the open problems remained in virtual network research are pointed out,such as performance cost,quality of service,self adaptation and network security.