问题
单项选择题
Basically, a firewall is a (71) process or a set of integrated processes that runs on a router or (72) to control the flow of networked application traffic (73) through it. Typically, firewalls are placed on the entry point to a (74) Network such as the Internet. They could be considered traffic cops. The firewall’s (75) is to ensure that all communication between an organization’s network and the Internet conform to the organization’s security policies.
（71）处填（）。
A．dependent
B．isolated
C．related
D．standalone
答案
参考答案：D
解析：
基本上，防火墙是运行在路由器或服务器(server)上，用来控制流经(passing，用分词作定语)它的网络应用程序信息一个独立的(standalone)或一组集成的进程。典型的防火墙配置于像Internet这样的公共(public)网络的入口处。可以把它们看作交通警察。防火墙的角色(role)就是确保某组织的网络与Internet之间的所有通信符合该组织的安全策略。