Patent ID: 8832313

Claim:
A terminal device comprising: a first communication circuit communicating with a network device connected to a network, the first communication circuit: receiving a first destination address of a first server accompanied with identification information for identifying the network device, the first destination address being unknown to the terminal device, and receiving from the network device first transmission data which is the same data as second transmission data that the network device transmits to the first server, the first transmission data containing internal data of the network device and the identification information; a device information storage that stores the first destination address in association with the identification information; a second communication circuit communicating with a second server which has a second destination address, the second communication circuit: transmitting the first transmission data using the first destination address that corresponds to the identification information in the device information storage, and receiving from the second server a result indicating whether the first transmission data transmitted from the second communication circuit matches the second transmission data that the network device transmits to the first server, whether the first transmission data is received by the second server, and whether the first destination address matches the second destination address; and a display that displays the result.