Konica Minolta 4750dn Reference Guide

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Network Printing
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SMTP
SMTP (Simple Mail Transfer Protocol) is a protocol for sending e-mail.
This protocol was originally used to send e-mail between servers; however, 
currently client e-mail software use it to also send e-mail to servers using 
POP.
SNMP
SNMP (Simple Network Management Protocol) is actually a set of protocols 
for managing complex networks. SNMP works by sending messages to differ-
ent 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.
WSD print
Printing is possible using the WSD (Web Service on Devices) function 
installed in Windows Vista. A connection supports WSD, detects the printer 
on the network automatically and connects. Specifying a WSD printer when 
printing from Windows Vista allows printing using Web service for communi-
cation.