Question and response
Question
dig pool.ntp.dockersrc.us. ZONEMD
Answer
pool.ntp.dockersrc.us. 4 CNAME casjay.pool.ntp.org.
Authority
pool.ntp.org. 1300 SOA f.ntpns.org. hostmaster.pool.ntp.org. 1772938199 5400 5400 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0