iPadOS 8.1 (build 12B410) is an official Apple over-the-air update for the iPad 2 (WiFi), released on 2014-10-20T17:59:03Z. The update package is 901.26 MB. This is a delta (partial) update that requires 7.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 63b5b36f37592893ac8e9e554dd814d849f79ea8.zip.