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# MultipeerConnectivity Constants

## Topics

### Constants

[`let MCErrorDomain: String`](/documentation/MultipeerConnectivity/MCErrorDomain)

The `NSError` domain constant. If the `domain` value for an `NSError` object is equal to `MCErrorDomain`, then the error was produced by the Multipeer Connectivity framework itself, as opposed to a lower-level framework on which it depends.

[`let kMCSessionMaximumNumberOfPeers: Int`](/documentation/MultipeerConnectivity/kMCSessionMaximumNumberOfPeers)

The maximum number of peers that a session can support, including the local peer.

[`let kMCSessionMinimumNumberOfPeers: Int`](/documentation/MultipeerConnectivity/kMCSessionMinimumNumberOfPeers)

The minimum number of peers that a session can support, including the local peer.


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