下面能实现NAT 的是()。
- A.DNS 服务器
- B.代理服务器
- C.FTP 服务器
- D.Web服务器
正确答案及解析
正确答案
解析
NAT(网络地址转换),是通过将私用网络地址(如企业内部网Intranet)转换为公用地址(如互联网Internet),从而对外隐藏了内部管理的IP 地址。这样,通过在内部使用非注册的 IP 地址,并将它们转换为一小部分外部通用的公网IP 地址,从而减少了IP 地址注册的费用以及节省了越来越缺乏的地址空间。同时,这也隐藏了内部网络结构,从而降低了内部网络受到攻击的风险。
NAT功能通常被集成到路由器、防火墙、单独的NAT设备中,当然,现在比较流行的操作系统或其他软件(主要是代理软件,如WINROUTE,安装在主机上,形式代理服务器),大多也有着NAT的功能。
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