Control system, electronic device, and control method

A control system comprising a first client terminal, a first server, and a second server, wherein

• the first client terminal
• transmits an assignment request of an Internet Protocol (IP) address to the first server, the assignment request comprising first identification information that uniquely identifies the first client terminal and is set as a first host name, the first server
• assigns a first IP address to the first client terminal in accordance with the assignment request, and
• transmits the first IP address and the first host name to the second server and the first client terminal, the second server being configured independently from the first server, and
• the second server
• stores one or more items of second identification information that uniquely identify one or more client terminals respectively, in a memory, wherein each of the one or more client terminals is subject to a setup process,
• receives the first IP address and the first host name, which are shared with the first client terminal, from the first server, and
• transmits, when the one or more items of the second identification information include the first identification information set as the first host name and when the setup process of the first client terminal has not been performed, data for the setup process of the first client terminal to the first client terminal using the first IP address, wherein
• the second server requests the first server to transmit assignment information comprising an IP address and a host name of a client terminal to which the IP address is assigned, and
• the first server transmits, when the assignment information is requested by the second server after the first IP address is assigned to the first client terminal, the assignment information comprising the first IP address and the first host name to the second server.