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In a db.root file, what are these lines supposed to mean?

$TTL 86400
. IN SOA A.ROOT-SERVERS.EDU. root.A.ROOT-SERVERS.EDU. (
        1       ; serial number (update count)
        28800   ; refresh (8 h)
        7200    ; retry (2 h)
        604800  ; expire
        10800   ; negative caching
        )
LTPCGO
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Tommy Bobby
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    https://tools.ietf.org/html/rfc1035#page-19 – Sven May 24 '16 at 15:39
  • @Sven RFC 1035 isn't a 100% accurate reference for SOA records (see [RFC 2308](https://tools.ietf.org/html/rfc2308#section-4)), so it's usually simpler to link to an online book. (i.e. http://www.zytrax.com/books/dns/ch8/soa.html) – Andrew B May 24 '16 at 16:06

1 Answers1

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Recursive bind configurations have a zone file for '.' often named db.root The root zone consists of the top level domains such as com, net, org, arpa, us, ca, etc

TO learn more please refer https://en.wikipedia.org/wiki/Root_name_server

Techiescorner
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