防火墙的工作原理和防止拒绝服务攻击的方式

The Working Principle of Firewalls and the Way of Prevent Denial of Service Attacks

防火墙指的是隔离本地网络与外界网络之间的一道防御系统。在互联网上,防火墙是一种非常有效的网络安全模型,通过它可以隔离风险区域与安全区域的连接,同时不会妨碍人们对风险区域的访问。

The firewall refers to isolating a system of defence between network here and external network. The firewall is a kind of very valid online security model on Internet, through it can isolate the risk area to connect with the security area, will not hinder people＇s visit to risk area at the same time.