关键词: 虚拟计算环境 虚拟网络 虚拟机 网络隧道

Abstract:

Recently, virtual computing environment has become a hot research topic in computer science. Virtual network is one of the key techniques for establis hing 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.

Key words: virtual computing environment, virtual network, virtual machine, network tunnel