The Design And Implementation Of Security Solution For Computer Network

Complexity and variability of network environment, together with vulnerability of information systems, lead to the existence of network security threats. Network security problems are related to economic development, social development and national security.This dissertation mainly concerns about security issues of computer network based on physical isolation in a instance of network security. After analyzing the needs of the network system, the security problems of computer network are analyzed. According to the result of analyzing, a security solution is proposed to meet needs of network security design and the layout of network security system, including the risks that come from physical layer, network layer and system layer, the security threats of virus and data transmission. The solution uses advanced network security technologies, such as physical isolation, desktop system security, virus protection, identity verification, access control, message encryption, undeniable, security audit, intrusion detection, loopholes scanning, electromagnetism leakage and emission safety and security management, to build a network security defense system which is integrated, comprehensive and multilevel.