CFNetwork Constants Constants for use with CFNetwork. TopicsConstantskCFHTTPVersion3_0kCFStreamNetworkServiceTypeAVStreamingkCFStreamNetworkServiceTypeResponsiveAVkCFStreamNetworkServiceTypeResponsiveDatakCFStreamPropertyAllowConstrainedNetworkAccesskCFStreamPropertyAllowExpensiveNetworkAccesskCFStreamPropertyConnectionIsExpensive See AlsoReferenceCFNetwork Data TypesCFNetwork Enumerations