Number is parenthesis are the recommended values.
Port 9100 is used for printing. Port numbers 9101 and 9102 are for parallel ports 2 and 3 on the three-port HP JetDirect external print servers. This port can be accessed by any SNMP Management utility. HP JetAdmin and HP Web JetAdmin use SNMP to configure and query the status of HP JetDirect devices. UDP port 162 for SNMP traps.