iPadOS 11.1 (build 15B5086a) is an official Apple over-the-air update for the iPad 5 (WiFi), released on 2017-10-16T17:04:01Z. The update package is 100.17 MB. This is a delta (partial) update that requires 11.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 201b9400d7cf44e6c860bb93fb0c07896fc2aa53.zip.