Patent ID: 8255727

Claim:
A printing apparatus connectable to a network, the printing apparatus comprising: a printing engine; and a transmitter-receiver to transmit packet data to an external device and to receive packet data from the external device via the network, the printing apparatus being operable in a sleep mode and an active mode, if no packet data is transmitted from the external device via the network for a predetermined period of time when the printing apparatus is in the active mode, the printing apparatus transitions from the active mode to the sleep mode, if the packet data received via the transmitter-receiver from the network in the sleep mode is a multicast packet data, a respondent packet data is transmitted via the transmitter-receiver to the network without the printing apparatus transitioning from the sleep mode to the active mode in response to the received multicast packet data, and if the packet data received via the transmitter-receiver from the network in the sleep mode is printing packet data, the printing apparatus transitions from the sleep mode to the active mode and the printing engine performs a printing operation in the active mode.