http://awuuwa.i2p/webpages/randomstatementsandarticles.html
Well in some sense that's arbitrary, it doesn't really matter so long as it's done in a read-only way, so it could be a DVD, however, for the latest security updates it's better to have a netboot over the LAN, so a server running in the library backrooms provides the disk image into the local network that the computers can boot from, some IT guy just needs to go to that server once in a while to update the disk image with the latest security updates, and that is not too...