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IMHO, a network printer should be given a Static IP address and if you do so, you will know what the ipaddress is. Usually you can websearch about how to assign a static ip address to a particular make/model of printer. Cups has several protocols that will access network printers including ipp://, sockets:// and http://.
HP's JetDirect (socket://ipaddress:9100) has long history of stability and reliability.