---
title: source
framework: network
role: symbol
role_heading: Instance Property
path: network/nwconnection/establishmentreport/resolution/source-swift.property
---

# source

The source of the DNS response.

## Declaration

```swift
let source: NWConnection.EstablishmentReport.Resolution.Source
```

## See Also

### Measuring Performance

- [duration](network/nwconnection/establishmentreport/resolution/duration.md)
- [NWConnection.EstablishmentReport.Resolution.Source](network/nwconnection/establishmentreport/resolution/source-swift.enum.md)
- [dnsProtocol](network/nwconnection/establishmentreport/resolution/dnsprotocol-swift.property.md)
- [NWConnection.EstablishmentReport.Resolution.DNSProtocol](network/nwconnection/establishmentreport/resolution/dnsprotocol-swift.enum.md)