We pick i.root-servers.net, one of the 13 root servers (1), and ask it about myns.cn and learn that cn is delegated to six name servers (2), so we ask e.dns.cn where we learn that myns.cn is delegated to two name servers, including ns2.myns.cn (3), so we ask that one and get the following answer:
Myns.cn is a domain controlled by two domain name servers at myns.cn themselves. Both are on different IP networks. Myns.cn has one IP number (220.112.40.174).
Myns.cn is hosted on a server in Shenzhen, 30, China.
Which servers does myns.cn use?
Myns.cn uses the primary name server ns1.myns.cn, the two name servers ns1 and ns2.myns.cn together, hereafter referred to as "name server group 1", and the IPv4 number 220.112.40.174 only.
The primary name server ns1.myns.cn only
All of the about seventy domains that use the primary name server ns1.myns.cn use name server group 1 (example: huji114.com, topviewchina.com and megamed-elite.net ). Worth noting is that most of the domains that use name server group 1 use the primary name server ns1.myns.cn.
The two name servers ns1 and ns2.myns.cn together
There are about seventy domains that use name server group 1.