[Issue Unconfirmed]
There is a colloquial technique some printers support to allow a Client to
acquire the Printer's default resource path, where the Client submits a
Get-Printer-Attributes request to the resource path "/" to get the
Printer's "printer-uri-supported" to discover its actual resource path,
which might not be "/ipp/print". But this isn't codified anywhere in a PWG
specification.
Add to IPP Everywhereâ„¢ 2.0 that the Printer MUST support
Get-Printer-Attributes at a resource path of "/" to support default Printer
resource path discovery.
Link: http://www.pwg.org/issues/101