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本文分别从防火墙、加密技术和PKI技术三个方面对网络安全作些初步探讨,着重论述了网络防火墙安全技术的分类及其主要技术特征。
This paper discusses the network security from the aspects of firewall, encryption technology and PKI technology respectively, and mainly discusses the classification of network firewall security technology and its main technical features.