Abstract: A transmission apparatus includes a plurality of ports configured to communicate with another transmission apparatus, a storage configured to store a data file, attribute information of the data file, and management information indicating to respond or not to a transfer request for the data file with respect to each of the plurality of ports, respectively, and a processor configured to transmit the attribute information from each of the plurality of ports, and decide whether or not to transmit the data file from a first port of the plurality of ports on the basis of the management information when the first port receives the transfer request from the other transmission apparatus.

Abstract: A transmission apparatus holds user information of an external device for a predetermined period of time and maintains a second protocol session between the own apparatus and another transmission apparatus for the predetermined period of time when a first protocol session between the external device and the own apparatus is disconnected. After the first protocol session is newly established, when a log-in is requested from an external device within the predetermined period of time, the transmission apparatus determines whether the user information of the external device that requested the log-in matches the user information it holds. When these pieces of user information match, the transmission apparatus connects the first protocol session newly established with the second protocol session maintained.