CONTROL DEVICE, AND PROGRAM

摘要

Provided are a control device and program which can assess whether multicast signal transfer irregularities are present in a relay device. A path determination unit 15 of a control device 1 determines, on the basis of a response signal received by a reception unit 13, whether communication paths 92, 93 used by equipment 3 are capable of multicast transmission. If the reception unit 13 does not receive a response signal for a multicasted first response request from the equipment 3, and receives a response signal for a unicasted second response request, the path determination unit 15 determines that the communication path used by the equipment 3 is incapable of multicast transmission.