---
title: nw_parameters_expired_dns_behavior_default
framework: network
role: symbol
role_heading: Global Variable
path: network/nw_parameters_expired_dns_behavior_default
---

# nw_parameters_expired_dns_behavior_default

Let the system determine whether or not to allow expired DNS answers.

## Declaration

```swift
var nw_parameters_expired_dns_behavior_default: nw_parameters_expired_dns_behavior_t { get }
```

## See Also

### Expired DNS behaviors

- [nw_parameters_expired_dns_behavior_allow](network/nw_parameters_expired_dns_behavior_allow.md)
- [nw_parameters_expired_dns_behavior_prohibit](network/nw_parameters_expired_dns_behavior_prohibit.md)