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# Selection Options Dictionary Keys

Keys used with the [`SCNetworkConnectionCopyUserPreferences(_:_:_:)`](/documentation/SystemConfiguration/SCNetworkConnectionCopyUserPreferences(_:_:_:)) selection options dictionary.

## Topics

### Constants

[`kSCNetworkConnectionSelectionOptionOnDemandHostName`](/documentation/SystemConfiguration/kSCNetworkConnectionSelectionOptionOnDemandHostName)

The key associated with a host name used to select the “best” network connection.

[`kSCNetworkConnectionSelectionOptionOnDemandRetry`](/documentation/SystemConfiguration/kSCNetworkConnectionSelectionOptionOnDemandRetry)

The key associated with a Boolean value used to indicate whether a DNS query has already been issued for the specified on-demand host name.


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