The option -sockets can be used in a shortcut to specifiy which networking mode to use. The -sockets networking mode uses the BIS implementation of networking code. This mode lacks the in game voice over IP that is supported with the option -dplay. The networking code has been optimized in the -sockets and therefore is the preferred networking method when playing online.
TeamSpeak is an alternative VOIP application that is used to replace the in game VOIP lost when using -sockets.