Question 1. Which mode does Universal Print server support.
Question 2. If mode 1 is not supported.How to transmit IPP protocol data between printer and server.
Question 3. In mode 2, how to receive notifications in real time. For example after the print job is submitted to the server, the printer will receive notification within 5 seconds . The printer checks the server every 5 seconds? Or the printer must have a public URL for the server to access?