I am always a fan of freebies and of course I am always eager to learn new things so when I saw a post by Admin Magazine on Facebook to advise that to celebrate Sysadmin day 2012 they have partnered with Splunk to offer a free IPv6 download special.
The special covers numerous subjects covering what IPv6 is and how it works through too how to programme using IPv6. Be aware however the download is only available today.
You can download the special here.
On a related note those interested in the free download may also be interested in a guide that Burst.net have provided regarding IPv6 as well which you can download from here.
You never know, one day the world might be ready for IPv6 and we will need to know this stuff.