/usr/lib/cups/backend/snmp 

network socket://192.168.2.114:9100 "HP Officejet 6500 E710n-z" "Officejet 6500 E710n-z" "MFG:HP;MDL:Officejet 6500 E710n-z;CMD:MLC,PCL,DW-PCL,PML,802.11,802.3,DESKJET,DYN;1284.4DL:4d,4e,1;CLS:PRINTER;DES:CN557A;CID:HPIJVIPAV2;LEDMDIS:USB#FF#CC#00,USB#07#01#02,USB#FF#04#01;SN:CN08A110MJ05JW;S:038080C484001021005a0c8000045d0006444d0006446d0006441d00046;Z:0102,05000009000001000001000001000001,0600,0700000000000000000000,0b000000000000000000000000000000000000000000000000000000000000,0c0,0e00000000000000000000,0f00000000000000000000,10000002000008000008000008000008,110,12000,150,17000000000000000000000000000000;" ""


sudo /usr/lib/cups/backend/dnssd 

DEBUG: Found "Officejet 6500 E710n-z [233F66]._ipp._tcplocal"...
DEBUG: Found "Officejet 6500 E710n-z [233F66]._pdl-datastream._tcplocal"...
DEBUG: Querying "Officejet\0326500\032E710n-z\032\091233F66\093._ipp._tcp.local"...
DEBUG: Querying "Officejet\0326500\032E710n-z\032\091233F66\093._pdl-datastream._tcp.local"...
DEBUG: sent=0, count=2
DEBUG2: query_callback(browser=0x7f0a98e672b0, interfaceIndex=3, protocol=0, event=0, fullName="Officejet\0326500\032E710n-z\032\091233F66\093._ipp._tcp.local", rrclass=1, rrtype=16, rdata=0x7f0a98e66ea4, rdlen=287, flags=5, context=0x7f0a98e66cb0)
DEBUG2: query_callback: "txtvers=1".
DEBUG2: query_callback: "qtotal=1".
DEBUG2: query_callback: "pdl=application/vnd.hp-PCL,image/urf,image/jpeg".
DEBUG2: query_callback: "rp=ipp/printer".
DEBUG2: query_callback: "URF=CP1,MT1-2-8-9-10-11,OB9,OFU0,PQ3-4-5,RS300-600,SRGB24,W8,DM3,IS1".
DEBUG2: query_callback: "ty=Officejet 6500 E710n-z".
DEBUG2: query_callback: "product=(HP Officejet 6500 E710n-z)".
DEBUG2: query_callback: "priority=60".
DEBUG2: query_callback: "adminurl=http://HP233F66.local.".
DEBUG2: query_callback: "note=".
DEBUG2: query_callback: "Color=T".
DEBUG2: query_callback: "Duplex=T".
DEBUG2: query_callback: "Scan=T".
DEBUG2: query_callback(browser=0x7f0a98e672b0, interfaceIndex=2, protocol=0, event=0, fullName="Officejet\0326500\032E710n-z\032\091233F66\093._ipp._tcp.local", rrclass=1, rrtype=16, rdata=0x7f0a98e68db4, rdlen=287, flags=5, context=0x7f0a98e66cb0)
DEBUG2: query_callback: "txtvers=1".
DEBUG2: query_callback: "qtotal=1".
DEBUG2: query_callback: "pdl=application/vnd.hp-PCL,image/urf,image/jpeg".
DEBUG2: query_callback: "rp=ipp/printer".
DEBUG2: query_callback: "URF=CP1,MT1-2-8-9-10-11,OB9,OFU0,PQ3-4-5,RS300-600,SRGB24,W8,DM3,IS1".
DEBUG2: query_callback: "ty=Officejet 6500 E710n-z".
DEBUG2: query_callback: "product=(HP Officejet 6500 E710n-z)".
DEBUG2: query_callback: "priority=60".
DEBUG2: query_callback: "adminurl=http://HP233F66.local.".
DEBUG2: query_callback: "note=".
DEBUG2: query_callback: "Color=T".
DEBUG2: query_callback: "Duplex=T".
DEBUG2: query_callback: "Scan=T".
DEBUG2: query_callback(browser=0x7f0a98e672b0, interfaceIndex=-1, protocol=-1, event=2, fullName="Officejet\0326500\032E710n-z\032\091233F66\093._ipp._tcp.local", rrclass=1, rrtype=16, rdata=(nil), rdlen=0, flags=0, context=0x7f0a98e66cb0)
DEBUG2: query_callback(browser=0x7f0a98e677f0, interfaceIndex=3, protocol=0, event=0, fullName="Officejet\0326500\032E710n-z\032\091233F66\093._pdl-datastream._tcp.local", rrclass=1, rrtype=16, rdata=0x7f0a98e68f50, rdlen=203, flags=5, context=0x7f0a98e67000)
DEBUG2: query_callback: "txtvers=1".
DEBUG2: query_callback: "qtotal=1".
DEBUG2: query_callback: "pdl=application/vnd.hp-PCL,image/urf,image/jpeg".
DEBUG2: query_callback: "ty=Officejet 6500 E710n-z".
DEBUG2: query_callback: "product=(HP Officejet 6500 E710n-z)".
DEBUG2: query_callback: "priority=30".
DEBUG2: query_callback: "adminurl=http://HP233F66.local.".
DEBUG2: query_callback: "note=".
DEBUG2: query_callback: "Color=T".
DEBUG2: query_callback: "Duplex=T".
DEBUG2: query_callback: "Scan=T".
DEBUG2: query_callback(browser=0x7f0a98e677f0, interfaceIndex=2, protocol=0, event=0, fullName="Officejet\0326500\032E710n-z\032\091233F66\093._pdl-datastream._tcp.local", rrclass=1, rrtype=16, rdata=0x7f0a98e66ad0, rdlen=203, flags=5, context=0x7f0a98e67000)
DEBUG2: query_callback: "txtvers=1".
DEBUG2: query_callback: "qtotal=1".
DEBUG2: query_callback: "pdl=application/vnd.hp-PCL,image/urf,image/jpeg".
DEBUG2: query_callback: "ty=Officejet 6500 E710n-z".
DEBUG2: query_callback: "product=(HP Officejet 6500 E710n-z)".
DEBUG2: query_callback: "priority=30".
DEBUG2: query_callback: "adminurl=http://HP233F66.local.".
DEBUG2: query_callback: "note=".
DEBUG2: query_callback: "Color=T".
DEBUG2: query_callback: "Duplex=T".
DEBUG2: query_callback: "Scan=T".
DEBUG2: query_callback(browser=0x7f0a98e677f0, interfaceIndex=-1, protocol=-1, event=2, fullName="Officejet\0326500\032E710n-z\032\091233F66\093._pdl-datastream._tcp.local", rrclass=1, rrtype=16, rdata=(nil), rdlen=0, flags=0, context=0x7f0a98e67000)
network dnssd://Officejet%206500%20E710n-z%20%5B233F66%5D._pdl-datastream._tcp.local/ "HP HP Officejet 6500 E710n-z" "Officejet 6500 E710n-z [233F66]" "MFG:HP;MDL:Officejet 6500 E710n-zCMD:PCL,URF,JPEG;" ""
DEBUG: sent=2, count=2
DEBUG: sent=2, count=0


/usr/lib/cups/backend/snmp 192.168.2.114


network socket://192.168.2.114:9100 "HP Officejet 6500 E710n-z" "Officejet 6500 E710n-z" "MFG:HP;MDL:Officejet 6500 E710n-z;CMD:MLC,PCL,DW-PCL,PML,802.11,802.3,DESKJET,DYN;1284.4DL:4d,4e,1;CLS:PRINTER;DES:CN557A;CID:HPIJVIPAV2;LEDMDIS:USB#FF#CC#00,USB#07#01#02,USB#FF#04#01;SN:CN08A110MJ05JW;S:038080C484001021005a0c8000045d0006444d0006446d0006441d00046;Z:0102,05000009000001000001000001000001,0600,0700000000000000000000,0b000000000000000000000000000000000000000000000000000000000000,0c0,0e00000000000000000000,0f00000000000000000000,10000002000008000008000008000008,110,12000,150,17000000000000000000000000000000;" ""