DNS delegation of linux.tucows.com updated: May 24, 2013 12:32:56 PM
Delegation
step
query
auth
servers
1
linux.tucows.com.
.
(e,i,b,f,h,c,k,j,m,g,l,d,a).root-servers.net.
2
linux.tucows.com.
com.
(f,m,h,a,c,d,k,i,e,j,b,g,l).gtld-servers.net.
3
linux.tucows.com.
tucows.com.
(ns3,ns2,ns1).tucows.com.
4
www.tucows.com.
tucows.com.
(ns1,ns3,ns2).tucows.com.
We pick e.root-servers.net, one of the 13 root servers (1), and ask it about linux.tucows.com and learn that com is delegated to 13 name servers (2), so we ask f.gtld-servers.net where we learn that tucows.com is delegated to three name servers, including ns3.tucows.com (3), so we ask that one where we see a CNAME from linux.tucows.com to www.tucows.com, so we have to start all over again. We already know that ns1.tucows.com is authoritative for tucows.com (4) and ask it about www.tucows.com and get the following answer:
linux.tucows.com has one IP number (216.40.32.32), via cname to www.tucows.com, which also has a corresponding reverse pointer. Howto.tucows.com, www.linuxberg.com and www.linux-howto.com cnames to...