firewall.png, Creative Commons, http://commons.wikimedia.org/wiki/File:Fire.png

router.png, Creative Commons, http://commons.wikimedia.org/wiki/File:Farm-Fresh_router.png

tablet-apple-ipad.png, Creative Commons, http://commons.wikimedia.org/wiki/File:Tablet-apple-ipad.svg

platform_android.png, Creative Commons Attribution Share Alike, http://findicons.com/icon/439900/android?id=449988#