我正在努力理解域whois查询的到期相关输出.com。特别是我并没有真正理解该Registrar Registration Expiration Date领域的含义。
这是一个例子（缩短）：
$ whois example.com
Whois Server Version 2.0
Domain names in the .com and .net domains can now be registered
with many different competing registrars. Go to http://www.internic.net
for detailed information.
Domain Name: example.com
Registrar: CRONON AG
Sponsoring Registrar IANA ID: 141
Whois Server: whois.cronon.net
Referral URL: http://www.cronon.net
Name Server: NS.STRATOSERVER.NET
Name Server: NS2.STRATOSERVER.NET
Status: ok https://icann.org/epp#ok
Updated Date: 12-sep-2016
Creation Date: 12-sep-2011
Expiration Date: 12-sep-2017
[...]
Domain Name: example.com …