随着社会不断进步，计算机网络技术日益发展，已被广泛应用到社会多个领域中，极大地改变了人们的生活方 式。但计算机网络具有开放性特征，极易受到各种安全威胁。因此，本文客观阐述了虚拟网络技术及其在计算机网络安全中 的作用，多角度探讨了计算机网络安全中虚拟技术的应用。

With the continuous progress of society, the development of computer network technology has been widely used in many fields of society. It has greatly changed people's life. Computer network has the characteristic of openness, causing it vulnerable to suffer from all kinds of security threats. Therefore, this paper expounds the virtual network technology and its role in computer network security, and discusses on the application of virtual technology in computer network security.