什么是个人防火墙?
A personal firewall is a firewall-like software application which runs on a users PC.个人防火墙是一个防火墙式应用软件用户举办了筹委会.

Traditional software-based firewalls run as the only application on stand-alone computers which have been hardened to protect against hackers.传统的软件为基础的防火墙仅适用于办成独立式电脑已经硬化防止黑客入侵. Personal firewalls run on PC's along with all of the other applications required by the PC user.个人电脑防火墙跑的同所有其他应用所需的微机用户.

Traditional firewalls protect entire networks.传统的防火墙保护整个网络. Personal firewalls are normally designed to protect only the PC upon which they are installed.旨在保护个人防火墙通常只在个人电脑所安装的.

Because they run on the same computer as the other applications, personal firewalls have more information available to them than traditional network firewalls.因为他们跑同一计算机作为其他用途,个人防火墙有更多资料提供给他们比传统网络防火墙. The traditional network firewall knows whether the traffic is TCP , UDP , or ICMP .传统网络防火墙的TCP不知交通、UDP协议或失踪. It knows what port number the traffic uses.它知道一些港口的交通设施. It may know something about the protocol being utilized.也许知道这个协议被利用. It also knows the source and destination of the traffic.它也知道来源地和目的地的交通. A personal firewall knows all of this, but also knows what software application is sending or receiving the traffic.个人防火墙知道这一切,而且还知道什么是应用软件发送或接收的流量. .

Most personal firewalls pop-up windows to notify the user about unknown network traffic.大多数个人防火墙弹起窗口通知用户网络流量约不明. The user is then given the choice to allow or deny the traffic.然后用户可以选择允许或拒绝流量.

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回答者：任虎成 .

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谢谢

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