1. akamai/cname_response

1.1. resolve www.ana.co.jp

www.ana.co.jp CNAME www.ana.co.jp.edgekey.net
www.ana.co.jp.edgekey.net CNAME www.ana.co.jp.edgekey.net.globalredir.akadns.net

1.2. resolve www.ana.co.jp.edgekey.net.globalredir.akadns.net

with qname minimisation policy

net NS (zone cut)
akadns.net NS (zone cut)
globalredir.akadns.net CNAME
net.globalredir.akadns.net CNAME
...
ana.co.jp.edgekey.net.globalredir.akadns.net CNAME
www.ana.co.jp.edgekey.net.globalredir.akadns.net CNAME

1.3. CNAMEs

$ dnsq a qmail.www.ana.co.jp.edgekey.net.globalredir.akadns.net a1-128.akadns.net
1 qmail.www.ana.co.jp.edgekey.net.globalredir.akadns.net:
99 bytes, 1+1+0+0 records, response, noerror
query: 1 qmail.www.ana.co.jp.edgekey.net.globalredir.akadns.net
answer: qmail.www.ana.co.jp.edgekey.net.globalredir.akadns.net 300 CNAME a23.g.akamai.net