iPadOS 11.1 (build 15B93) is an official Apple over-the-air update for the iPad 5 (WiFi), released on 2017-10-23T17:04:48Z. The update package is 1021.9 MB. This is a delta (partial) update that requires 10.3.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 57ae251e760d9ff1d0fd4984ca3f6630693de64f.zip.