Networking Protocols
Phaser® 6115MFP Multifunction Product
4-3
LPD/LPR
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.
SLP
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.
SNMP
SNMP (Simple Network Management Protocol) is a set of protocols for managing complex
networks. SNMP works by sending messages to different parts of a network. SNMP-compliant
devices, called agents, store data about themselves in Management Information Bases (MIBs)
and return this data to the SNMP requesters.
Port 9100
When printing through a network, TCP/IP port number 9100 can be used to send raw data.
SMTP
SMTP (Simple Mail Transfer Protocol) is a protocol for sending email.
This protocol was originally used to send email between servers; however, currently client
email software uses it to send email to servers using POP.