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# kCFStreamPropertyAllowConstrainedNetworkAccess

A Boolean value that indicates whether connections may use the network when the user has specified Low Data Mode.

```
let kCFStreamPropertyAllowConstrainedNetworkAccess: CFString
```

## Discussion

The default value is <doc://com.apple.documentation/documentation/CoreFoundation/kCFBooleanTrue> and allows the use of constrained interfaces. Set this property to <doc://com.apple.documentation/documentation/CoreFoundation/kCFBooleanFalse> to disallow the use of constrained interfaces. For more information about constrained interfaces, see <doc://com.apple.documentation/documentation/Foundation/URLSessionConfiguration/allowsConstrainedNetworkAccess>.

---

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