|LPR/LPD is the printing protocol most commonly used in TCP/IP networks. LPR/LPD is used extensively on university and business campuses where AS400, UNIX, and mainframes systems are common.
The current generation of mainframe printing and business workstation operating systems supports TCP/IP and LPR/LPD. It is a computer-to-computer printing method, rather than PC-to-PC.
The LPD Protocol Specification is documented in RFC 1179, Line Printer Daemon Protocol, dated August 1990, edited by L. McLaughlin III, and downloadable.
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Easy, Platform-Independent Protocol
LPR/LPD is a platform-independent printing protocol widely used on the Internet for remote printing that allows multiple platforms to print to the same printer without any extra configurations.
Advantages of LPR/LPD Protocol
Comparison to FTP