Stream Service Types String constants that specify the service type of a stream. TopicsConstantskCFStreamNetworkServiceTypeVoIPkCFStreamNetworkServiceTypeVideokCFStreamNetworkServiceTypeBackgroundkCFStreamNetworkServiceTypeVoice See AlsoConstantsCFStreamStatusCFStreamErrorDomainCFStream Error Domain Constants (CFHost)Error SubdomainsSecure Sockets (SOCKS) ErrorsCFStreamEventTypeStream PropertiesCFStream Property SSL Settings ConstantsCFStream Socket Security Level ConstantsCFStream SOCKS Proxy Key Constants