Because setting the HTTP Host header is a standard step in using an HTTP proxy, very little additional work is needed to get the proxy server to forward the traffic properly.
因为设置HTTPhost头是使用HTTP代理的标准步骤，让代理服务器正确的转发消息只需要很少的额外工作。
If the gateway processing a datagram determines that the time to live field in the datagram's IP header is 0, it discards the datagram and notifies the sending host with a time Exceeded Message.
如果处理数据报的网关测定该数据报i p头中的生存时间字段为0，则丢弃该数据报并用超时消息通知源主机。
HTTP has a "host" header which allows a cost-cutting Internet hosting companies to pile hundreds of websites onto a single IP address.
HTTP协议中有一个“Host”头，这就允许了Internet托管公司出于成本的考虑将上百个网站绑定在同一IP地址上。
Restrict IIS virtual directory to specific HTTP host header?
限制IIS虚拟目录到特定的HTTP主机头？
If the application specifies a Host header, then this value will be used as domain.
如果应用程序指定主机标头，则会以其值作为网域。
As we'll see, when an application sends data to another host, each layer adds its own information to a header that is encapsulated as data by the protocol in the layer below.
正如我们所看到的，当应用软件向另一主机发送数据时，每一层都把自己的信息添加到一个数据头中。而这个数据头又被下一层中的协议包装到数据体之中。
As we'll see, when an application sends data to another host, each layer adds its own information to a header that is encapsulated as data by the protocol in the layer below.
正如我们所看到的，当应用软件向另一主机发送数据时，每一层都把自己的信息添加到一个数据头中。而这个数据头又被下一层中的协议包装到数据体之中。
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