A communication apparatus which communicates with one or more other communication apparatuses via a network, includes: one or more communication interfaces being used for communication with the one or more other communication terminals; a selection unit connected to the one or more communication interfaces and selecting at least one communication interface that is used in accordance with an instruction from a control device which controls communications; and a network establish unit establishing a virtual network by forming a virtual communication path which directly connects between the at least one communication interface selected by the selection unit and a communication interface included in at least one communication apparatus among the one or more other communication apparatuses.