The iPod touch 4 comes with a firmware identifier iPod4,1. It has a Board Configuration of n81ap and a Board Platform of s5l8930x. The CPID and BDID are 35120 and 8 respectively.
IPSWDL.COM is a website that provides download links for IPSW files, which are used to install or restore firmware on Apple devices. These files are sourced directly from Apple's servers.