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Full Discussion: DNS and hostname resolution
Special Forums IP Networking DNS and hostname resolution Post 302958362 by MadeInGermany on Wednesday 21st of October 2015 01:35:21 PM
Old 10-21-2015
Using nslookup you can explore domains
Code:
nslookup -q=ns youtube.com

and hosts
Code:
nslookup -q=a youtube.com

The host entry is for convenience. Normally servers are inside the domain; e.g. by convention a Web server gets a www. prefix.
In fact
Code:
nslookup -q=a www.youtube.com

gives the same result.
--
Interesting, the IPv6 lookups differ; I guess they use a different distribution mechanism.
Code:
nslookup -q=aaaa youtube.com

Code:
nslookup -q=aaaa www.youtube.com


Last edited by MadeInGermany; 10-21-2015 at 02:40 PM..
This User Gave Thanks to MadeInGermany For This Post:
 

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Net::DNS::Mailbox(3)					User Contributed Perl Documentation				      Net::DNS::Mailbox(3)

NAME
Net::DNS::Mailbox - DNS mailbox representation SYNOPSIS
use Net::DNS::Mailbox; $mailbox = new Net::DNS::Mailbox('user@example.com'); $address = $mailbox->address; DESCRIPTION
The Net::DNS::Mailbox module implements a subclass of DNS domain name objects representing the DNS coded form of RFC822 mailbox address. METHODS
new $mailbox = new Net::DNS::Mailbox('John.Doe@example.com'); $mailbox = new Net::DNS::Mailbox('John Doe <j.doe@example.com>'); Creates a mailbox object which represents the DNS domain encoded form of the mail address specified by the character string argument. The argument string consists of printable characters from the 7-bit ASCII repertoire. address $address = $mailbox->address; Returns a character string containing the RFC822 mailbox address corresponding to the encoded domain name representation described in RFC1035 section 8. DOMAIN NAME COMPRESSION AND CANONICALISATION
The Net::DNS::Mailbox1035 and Net::DNS::Mailbox2535 subclass packages implement RFC1035 domain name compression and RFC2535 canonicalisation. COPYRIGHT
Copyright (c)2009,2012 Dick Franks. All rights reserved. This program is free software; you may redistribute it and/or modify it under the same terms as Perl itself. SEE ALSO
perl, Net::DNS, Net::DNS::DomainName, RFC822, RFC1035, RFC5322 perl v5.18.2 2014-01-16 Net::DNS::Mailbox(3)
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