Here is the perl stuff I have installed.  I know there are some differences but not of the significance of the differences.  The function of some is fairly obvious from the name, others not so much, at least to me.  You can see the version of perl is 5.8.8-12.
 
[jim@localhost ~]$ rpm -q -a |grep perl
perl-Digest-HMAC-1.01-15
perl-IO-Socket-INET6-2.51-2.fc6
perl-HTML-Tagset-3.10-2.1.1
newt-perl-1.08-9.2.2
perl-BSD-Resource-1.28-1.fc6.1
perl-SGMLSpm-1.03ii-16.2.1
perl-IO-Socket-SSL-1.01-1.fc6
perl-MailTools-1.74-3.fc6
perl-5.8.8-12
perl-Digest-SHA1-2.11-1.2.1
perl-Archive-Tar-1.30-1.fc6
perl-Net-IP-1.25-2.fc6
perl-Net-SSLeay-1.30-4.fc6
perl-DBI-1.52-1.fc6
perl-Device-SerialPort-1.002-3.fc6
perl-MIME-Lite-3.01-5.fc6
perl-Compress-Zlib-1.42-1.fc6
perl-IO-Zlib-1.04-4.2.1
perl-String-CRC32-1.4-2.fc6
perl-HTML-Parser-3.55-1.fc6
perl-DateManip-5.44-2.fc6
perl-Archive-Zip-1.16-1.2.1
perl-URI-1.35-3
perl-DBD-MySQL-3.0007-1.fc6
perl-TimeDate-1.16-3.2.1
perl-Net-DNS-0.61-1.fc6
perl-Socket6-0.19-3.fc6
mod_perl-2.0.2-6.2.fc6
perl-libwww-perl-5.805-1.1.1
[jim@localhost ~]$