国科云提供域名管理、域名锁、智能解析、DDI、IPv6转换、SSL证书等一站式域名解决方案，并形成以云解析、云监控、云盾、云服务器为核心的云计算产品服务体系。
发布时间：2022-09-20 15:29:16
IPv6的广泛采用以网络设备提供商支持IPv6开始，然后到服务提供商，再到应用/内容提供商，最后将其逐渐延伸到企业和家庭使用。事实上，IETF（国际互联网工程任务组）至今已经提出超过20种IPv4和IPv6互通方案，时至今日我们并不缺少可行方案。总体来看，IPv4/IPv6转换技术可以大致分为三类：隧道 将IPv.........【阅读全文】
发布时间：2022-09-19 16:53:32
1. 域名状态异常你可以通过中科三方Whois查询工具查看你的域名当前所处的状态，如果域名处于以下几种状态时，域名无法被访问：Redemption period（域名过期，赎回期）Serverhold（注册局设置暂停解析）根据域名的解析流程可知，影响用户端域名解析是否生效主要取决于运营商提供的递归DNS服务器.........【阅读全文】
发布时间：2022-09-16 17:32:18
当我们第一次访问某个网站时，DNS在返回对应的IP地址后，系统会将这个记录临时存储下来，并为其设定一个有效期限（TTL），在有效期限内再次访问该网站，系统会直接将该结果返回，而无需求助DNS系统进行全球查询。这个临时储存下来的记录就是DNS缓存。如果超过DNS缓存的有效期限再次对该网站，系统会自动再次询问DNS服务器.........【阅读全文】
JVDLFFLR2025-08-03 17:15
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