I don't think it is: Core modules.
Indeed, this is strange. I first checked with Cygwin perl (5.10.0) and our Perl on Linux (5.10.1) and got the following pathes to Net::Telnet: 

/usr/lib/perl5/vendor_perl/5.10/Net/Telnet.pm
/opt/perl_5.10.1/lib/Net/Telnet.pm

[download]
But when I checked ActiveState Perl 5.10.0 on Windows, Net::Telnet was not included.

-- 
Ronald Fischer <ynnor@mm.st>

In reply to Re^3: perl+telnet(with out Net::Telnet) by rovf
in thread perl+telnet(with out Net::Telnet) by Anonymous Monk

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