suppose you changed your domain's nameservers and requested to open your domain on the web browser. your request will not go to the hosting directly. each isp node first checks its dns cache, whether it has the dns information for that domain. if it is not there, it will look it up by fetching dns information from the authoritative dns server of the domain to serve the user’s request. it also saves that info for future use to speed up the dns lookup process. thus, the new nameservers will not propagate instantly. isps have different cache refreshing levels resulting in some still having the old dns information in their cache.
网站成立于2013年10月8日。已开启gzip压缩。用户主要来自美国，主要流量来自搜索引擎。
