A communication device may establish both of first and second types of connections which are according to a particular protocol defined in an NFC standard. The first type of connection may be a connection in which the communication device operates as a server and an external device operates as a client. The second type of connection may be a connection in which the communication device operates as a client and the external device operates as a server. The communication device may receive, in accordance with a particular command of the particular protocol, first target data from the external device by using one connection of the first and second types of connections, and then sending, in accordance with the particular command of the particular protocol, second target data to the external device by using the other connection of the first type and the second type of connections.