Patent ID: 8782742

Claim:
A communication apparatus for transmitting an authentication frame to an authentication apparatus and receiving a response frame for response to the authentication frame from the authentication apparatus so that an authentication process is performed for the communication apparatus by the authentication apparatus, the communication apparatus comprising: at least one processor and memory; a transmission destination address changing section which changes a transmission destination address of the authentication frame; a reception determining section which determines whether the response frame is received from the authentication apparatus; and a transmitting section which transmits the authentication frame to the authentication apparatus, wherein the transmitting section transmits the authentication frame to the authentication apparatus using a multicast address as the transmission destination address, and if the reception determining section determines that the response frame is not received from the authentication apparatus, the transmission destination address changing section changes the transmission destination address from the multicast address to a broadcast address, and the transmitting section transmits the authentication frame that has the transmission destination address changed to the broadcast address to the authentication apparatus.