difference in responses between UDP and TCP

[Arun Natarajan]

Hello,

Wondering why we are seeing different serial numbers from a bind
authoritative server for requests over UDP and TCP.

dig +tcp soa @ns.example.com example.com +short
ns1.example.com. hostmaster.example.com. 2017061505 10800 3600 3600000 3600

dig +notcp soa @ns.example.com example.com +short
ns1.example.com. hostmaster.example.com. 2017061506 10800 3600 3600000 3600

any idea?

thanks,

--
arun
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