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1. 发明授权

US07181503B2 Apparatus and method of searching for DNS server in outernet 失效
标题翻译：在外网搜索DNS服务器的方法和装置
公开(公告)号：US07181503B2
公开(公告)日：2007-02-20
申请号：US10386106
申请日：2003-03-12
申请人： Hyun-seok Choi , Chul-min Kim , Young-geun Kim
发明人： Hyun-seok Choi , Chul-min Kim , Young-geun Kim
IPC分类号： G06F15/173
CPC分类号： H04L29/12047 , H04L12/18 , H04L29/12009 , H04L61/15
摘要： Outernet DNS searching units are included in a host, a DNS server, a router where a DNS server is registered, and a router where a DNS server is not registered, allowing Internet-enabled terminals to automatically search for a DNS server in an outernet. The host creates a DNS search message and transmits it to a subnet to which the host belongs so as to receive a response message. If no response message is received from the subnet (i.e., a DNS server is not connected to the subnet), the DNS search message is transmitted to an outernet to which the host does not belong, to which a DNS server is connected. Further, when a DNS server does not respond to a DNS search message from a host, a hop limit is increased to resend the DNS search message, thereby preventing waste of network bandwidth and easily detecting the closest DNS server.
摘要翻译： Outernet DNS搜索单元包含在主机，DNS服务器，注册DNS服务器的路由器以及DNS服务器未注册的路由器中，允许启用Internet的终端自动搜索外部网络中的DNS服务器。主机创建DNS搜索消息并将其发送到主机所属的子网，以便接收响应消息。如果没有从子网接收到响应消息（即，DNS服务器未连接到子网），则DNS搜索消息被发送到与DNS服务器连接的主机不属于的外部网络。此外，当DNS服务器不响应来自主机的DNS搜索消息时，增加跳数限制以重新发送DNS搜索消息，从而防止浪费网络带宽并且容易地检测最近的DNS服务器。

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