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Full Discussion: DNS and Authoritative Servers
Special Forums IP Networking DNS and Authoritative Servers Post 302877406 by jim mcnamara on Saturday 30th of November 2013 09:37:50 PM
Old 11-30-2013
There are two types of dns server responses: authoritative and recursive. An internet root server has all of the known IP's cached and updates them constantly. This is analogous to an NTP Level 0 server, if that helps. These root servers are always considered authoritative. Your ISP's dns is mostly recursive - i.e., it goes out and queries another dns server to get an authoritative answer.

Your ISP's dns is authoritative for nodes in its own domain (domain controller or a forest root). dns servers that are authoritative for certain domains advertise them to the outside world, i.e. internet root servers.

Code:
nslookup --type=SOA

will work in Linux as you require. I would consult the dig docset for whatever options it supports.
 

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LEARN ABOUT OSX

dnsextd

dnsextd(8)						    BSD System Manager's Manual 						dnsextd(8)

NAME

     dnsextd -- BIND Extension Daemon

SYNOPSIS

     dnsextd

DESCRIPTION

     dnsextd is a daemon invoked at boot time, running alongside BIND 9, to implement two EDNS0 extensions to the standard DNS protocol.

     dnsextd allows clients to perform DNS Updates with an attached lease lifetime, so that if the client crashes or is disconnected from the net-
     work, its address records will be automatically deleted after the lease expires.

     dnsextd allows clients to perform long-lived queries. Instead of rapidly polling the server to discover when information changes, long-lived
     queries enable a client to indicate its interest in some set of data, and then be notified asynchronously by the server whenever any of that
     data changes.

     dnsextd has no user-specifiable command-line argument, and users should not run dnsextd manually.

SEE ALSO

     mDNS(1) mDNSResponder(8)

     For information on Dynamic DNS Update, see RFC 2136 "Dynamic Updates in the Domain Name System (DNS UPDATE)"

     For information on Dynamic DNS Update Leases, see http://files.dns-sd.org/draft-dns-update-leases.txt

     For information on Long-Lived Queries, see http://files.dns-sd.org/draft-dns-llq.txt

BUGS

     dnsextd bugs are tracked in Apple Radar component "mDNSResponder".

HISTORY

     The dnsextd daemon first appeared in Mac OS X 10.4 (Tiger).

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