<page_title> List of TCP and UDP port numbers </page_title> <section_title> Well-known ports </section_title> <table> <cell> 631 <col_header> Port </col_header> </cell> <cell> Yes <col_header> TCP </col_header> </cell> <cell> Internet Printing Protocol (IPP) <col_header> Description </col_header> </cell> </table>
IPP uses TCP with port 631.