A data transport system comprises transport apparatus and at least one computer. The transport apparatus construct a second network coupled to a first network which is constructed by a communication apparatus. A logical path is built between a first transport apparatus and the computer. The first transport apparatus is configured to: hold management information, which associates identification information of a port with logical path identification information; refer to the management information to identify the logical path identification information that is associated with the port through which the control information has been received; and assign the identified logical path identification information to the control information, and transmit the control information over the logical path. The computer assigns the logical path identification information assigned to the control information to response information, and transmits the response information to the second network.