Network printing with ASUS RT-AC66R/CUPS

[slicktux]

Which one do i choose?..

Internet Printing Protocol (ipp)
Internet Printing Protocol (ipps)
Internet Printing Protocol (http)
Internet Printing Protocol (https)
AppSocket/HP JetDirect
LPD/LPR Host or Printer

I assume it's LPD/LPR Host or Printer. What syntax should i use?

http://hostname:631/ipp/
http://hostname:631/ipp/port1

ipp://hostname/ipp/
ipp://hostname/ipp/port1

lpd://hostname/queue

socket://hostname
socket://hostname:9100

All help is appreciated thank you!