屏蔽路由器;筛选路由器;路由器;遮罩路由器;过滤路由器
One is based on packet filtering, which is to realize firewall function through Screening Router; and the other is Proxy, the typical representation of which is the gateway on application level.
一种是基于代理技术(Proxy),它的代表是在筛选路由器上实现的防火墙功能。
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