---
title: transportRTTVariance
framework: network
role: symbol
role_heading: Instance Property
path: network/nwconnection/datatransferreport/pathreport/transportrttvariance
---

# transportRTTVariance

The variance of the round-trip time the transport protocol measured.

## Declaration

```swift
let transportRTTVariance: TimeInterval
```

## See Also

### Inspecting Transport Metrics

- [receivedTransportByteCount](network/nwconnection/datatransferreport/pathreport/receivedtransportbytecount.md)
- [receivedTransportDuplicateByteCount](network/nwconnection/datatransferreport/pathreport/receivedtransportduplicatebytecount.md)
- [receivedTransportOutOfOrderByteCount](network/nwconnection/datatransferreport/pathreport/receivedtransportoutoforderbytecount.md)
- [sentTransportByteCount](network/nwconnection/datatransferreport/pathreport/senttransportbytecount.md)
- [retransmittedTransportByteCount](network/nwconnection/datatransferreport/pathreport/retransmittedtransportbytecount.md)
- [transportSmoothedRTT](network/nwconnection/datatransferreport/pathreport/transportsmoothedrtt.md)
- [transportMinimumRTT](network/nwconnection/datatransferreport/pathreport/transportminimumrtt.md)