A printing system includes a host apparatus and two or more printer devices connected to each other via a network. The host device sends print data to the printer devices. If a network disconnection occurs while the host device is sending the print data to the printer devices, the printing devices maintain a session with the host device and keep the print data that has been received at a time point before the network disconnection occurred. When a network reconnection takes place, the printer devices receive only un-received print data from the host device.