Informs the delegate that an error occurred during resolution of a given service.
- iOS 2.0+
- macOS 10.2+
- Mac Catalyst 13.0+Beta
- tvOS 9.0+
The service that did not resolve.
Clients may try to resolve again upon receiving this error. For example, a DNS rotary may yield different IP addresses on different resolution requests. A common error condition is that no addresses were resolved during the timeout period specified in