A communication apparatus receives a communication request from a communication partner and determines whether itself functions as a server or a client. If a first parameter for communication for causing the communication partner to function as the client is included in the communication request and the communication apparatus functions as the server, the communication apparatus determines a second parameter for communication for causing the communication apparatus to function as the server based on the first communication parameter. If the communication apparatus offers the communication partner to function as the client in response to the communication request, the communication apparatus determines a third parameter for communication for causing the communication apparatus to function as the client. The communication apparatus transmits data indicating whether the communication apparatus functions as the server or the client, and the second or the third parameter for communication with the communication partner.