Question and response
Question
dig smtp.six-group.com. NS
Answer
smtp.six-group.com. 5 CNAME smtp.gslb.six-group.com.
Authority
gslb.six-group.com. 10 SOA vip-gslb-prod-zh-vpfi.six-group.com. hostmaster\@six-group.com. 33 3600 900 2592000 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0