一般用户建网时,都需 要考虑安全问题,(数 据安全、抗毁、实时性等〕,一般市场上产品安全性都不尽人意,所以建网时应在网络体系结构中纳入有关安全性问题。 以“防火墙”技术为代表的网络安全保障属于被动防卫型。即其特征是通过在网络边界上建立相应的网络通信监控系统(“防火墙”)来达到保障网络安全的目的。用“防火墙”实施网络 When building a network, all users need to consider security issues (data security, anti-destruction, real-time performance, etc.). Generally, product safety in the market is unsatisfactory. Therefore, security problems should be included in the network architecture when building a network The network security represented by the “firewall” technology belongs to the passive defense type, that is, its characteristic is to achieve network security by establishing a corresponding network communication monitoring system (“firewall”) on the border of the network. Implement the network