From www.gdgz.cncnet.net using nslookup ----------------------------------------------------------------------------------------- nslookup -type=mx cncnet.net Non-authoritative answer: cncnet.net MX preference = 10, mail exchanger = mail.cncnet.net cncnet.net nameserver = sh-dns.cncnet.net cncnet.net nameserver = bj-dns.cncnet.net cncnet.net nameserver = gz-dns.cncnet.net mail.cncnet.net internet address = 210.53.130.195 bj-dns.cncnet.net internet address = 210.52.149.2 gz-dns.cncnet.net internet address = 210.53.31.2 sh-dns.cncnet.net internet address = 210.52.207.2 ---------------------------------------------------------------------------------------------------- nslookup -type=mx gdgz.cncnet.net gdgz.cncnet.net primary name server = gz1-dns.gdgz.cncnet.net responsible mail addr = root.gz1-dns.gdgz.cncnet.net serial = 20030116 refresh = 10800 (3 hours) retry = 3600 (1 hour) expire = 604800 (7 days) default TTL = 86400 (1 day) From these info you can guess that CNCNet have two level in network topology. |
