---
title: expiredDNSBehavior
framework: network
role: symbol
role_heading: Instance Property
path: network/nwparameters/expireddnsbehavior-swift.property
---

# expiredDNSBehavior

A behavior that defines how expired DNS answers will be used.

## Declaration

```swift
final var expiredDNSBehavior: NWParameters.ExpiredDNSBehavior { get set }
```

## See Also

### Customizing Connection Options

- [multipathServiceType](network/nwparameters/multipathservicetype-swift.property.md)
- [NWParameters.MultipathServiceType](network/nwparameters/multipathservicetype-swift.enum.md)
- [serviceClass](network/nwparameters/serviceclass-swift.property.md)
- [NWParameters.ServiceClass](network/nwparameters/serviceclass-swift.enum.md)
- [allowFastOpen](network/nwparameters/allowfastopen.md)
- [NWParameters.ExpiredDNSBehavior](network/nwparameters/expireddnsbehavior-swift.enum.md)
- [requiresDNSSECValidation](network/nwparameters/requiresdnssecvalidation.md)
- [preferNoProxies](network/nwparameters/prefernoproxies.md)
- [includePeerToPeer](network/nwparameters/includepeertopeer.md)
- [allowLocalEndpointReuse](network/nwparameters/allowlocalendpointreuse.md)
- [acceptLocalOnly](network/nwparameters/acceptlocalonly.md)