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# isViable

The viability of a TCP connection indicates whether or not data can be transferred.

```
var isViable: Bool { get }
```

## Discussion

Evaluates to <doc://com.apple.documentation/documentation/Swift/true> if the connection can read and write data, <doc://com.apple.documentation/documentation/Swift/false> otherwise. Use Key-Value Observing to watch this property.

---

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