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1102 well that's a new one on me. I have no idea what that means.
1100 is a failure to download a file ( update software ). No specific reason listed for the failure. 1102 is probably a code for a specific release ( a new one that's not included on the error coding charts yet ).

Just guessing.
 
I had that before every time the servers are overwhelmed by demand such as today for the iOS 7 release. Usually, I waited it out and retried. Then, it would be okay after a while (few hours or may be one day) when the server load subside.
 
I had the same error several times earlier today. Just did the update now with no problems.
 
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