---
title: kDNSServiceFlagsKnownUnique
framework: dnssd
role: symbol
role_heading: Global Variable
path: dnssd/kdnsserviceflagsknownunique
---

# kDNSServiceFlagsKnownUnique

## Declaration

```swift
var kDNSServiceFlagsKnownUnique: UInt32 { get }
```

## Discussion

Discussion Client guarantees that record names are unique, so we can skip sending out initial probe messages. Standard name conflict resolution is still done if a conflict is discovered. Currently only valid for a DNSServiceRegister call.