Xerox 6120 User Manual

HTTP (HyperText Transfer Protocol) is the underlying protocol used by the 
World Wide Web. It defines how messages are formatted and transmitted, 
and what actions web servers and browsers should take in response to 
various commands. For example, when you enter a URL in your browser, this 
actually sends an HTTP command to the Web server directing it to fetch and 
transmit the requested web page. 

IPP (Internet Printing Protocol) is a protocol for end users’ most common 
printing situations over the Internet. It allows users to find out about a printer’s 
capabilities, submit print jobs to a printer, determine the status of the printer 
or print job, and cancel a previously submitted print job.

LPD/LPR (Line Printer Daemon/Line Printer Request) is a platform-
independent printing protocol that runs over TCP/IP. Originally implemented 
for BSD UNIX, its use has spread into the desktop world and is now an 
industry standard. 

Traditionally, in order to locate services on the network, users had to supply 
the host name or network address of the machine providing the desired 
service. This has created many administrative problems. 
However, SLP (Service Location Protocol) simplifies the discovery and use of 
network resources such as printers by automating a number of network 
services. It provides a framework that allows networking applications to 
discover the existence, location, and configuration of networked services.
With SLP users no longer need to know the names of network hosts. Instead, 
they need to know only the description of the service they are interested in. 
Based on this description, SLP is able to return the URL of the desired 
service.