网络地址转换(NAT)是用于将一个地址域(如:专用Intranet)映射到另一个地址域(如:Internet)的标准方法。NAT允许一个机构专用Intranet中的主机透明地连接到公共域中的主机,无需内部主机拥有注册的(以及越来越缺乏的)Internet地址。NAT设备就是具有网络地址转换功能的网络设备,可 Network Address Translation (NAT) is the standard method for mapping an address domain, such as a private intranet, to another address domain, such as the Internet. NAT allows hosts in one organization-specific intranet to transparently connect to hosts in the public domain without the need for internal hosts to have registered (and increasingly lacking) Internet addresses. NAT device is a network device with network address translation capabilities