There is provided an information processing system, which includes measures to address issues regarding the access control and/or session control, capable of transmitting and receiving a control packet from a remote apparatus that is placed on a network in a location where another party resides, with which voice dialog communications is being taken place. Further it is desirable to provide an information processing system and/or an information processing method with. Two personal digital assistants are respectively connected via radio to two connection points, which are called access points, to perform voice communication using VoIP network. In addition, the two personal digital assistants exchange packets of data between two personal computers via the Internet and local radio communication units after establishments of connections with the personal computers are achieved using RFID.