| 摘要 |
Control section (20) of a master device of the present invention includes: address acquisition section (21) for, when logical and physical addresses of playback device (200) being on a network in which the master device is a route device are acquired, registering the logical and physical addresses in a map table so that the logical and physical addresses are associated; command issuing section (23) for, when a physical address identical with the acquired physical address has been stored in the map table, issuing a command for confirming whether or not a device having a logical address associated with the physical address identical with the acquired physical address is on the network; and address table modifying means (24) for, when no device having the associated logical address is on the network, deleting, from the map table, the physical address identical with the acquired physical address.
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