To provide a name server capable of demonstrating a name solution function in a short time after supplying power again even in the case of storing a name solution table in a volatile memory.

After power is supplied again, at the time of receiving a message including the IP address of a pertinent computer and a NetBIOS name regularly broadcasted inside a LAN 2 by computers 31 and 32, this name server 4 uses the received message, generates the name solution table 6 for indicating the correspondence relation of the IP address of the computers 31 and 32 and the NetBIOS name and stores it in a DRAM 7.