A method of transferring data in a connection-type network in which nodes are connected via communication lines and terminals are connected to the nodes includes the steps of sending a request from a first one of the terminals to a second one of the terminals via a connection established on a first communication line, the request requesting transfer of data from the second one of the terminals to the first one of the terminals via a second communication line, establishing a connection on the second communication line between a first one of the nodes having the first one of the terminals attached thereto and a second one of the nodes having the second one of the terminals attached thereto, and transferring all or part of the data via the connection on the second communication line, wherein the second communication line is established to be in existence for a predetermined duration of time or for a time period during which all or part of the data is transferred.