Basic TCP/IP Terminology
Print Server Installation Manual 1-15
1.2.5. TCP/IP Ports
What Are TCP/IP
Ports?
During the transfer of files between two computers, addressing
with the IP address alone generally does not suffice. In addition to
the IP address, the port number (TCP/IP port)is used. This number
defines a specific computer memory area reserved for a specific
communications connection. The combination of an IP address
and a port number is unique for every communications connection
and is defined as a socket.
LPD Protocol and
TCP/IP Ports
If the LPD protocol is used for transferring print data, the
corresponding data packet automatically contains the port number
'515' and does not need to be specifically configured. The
transferred print data is saved to the memory area corresponding to
this TCP/IP port and then processed.
TCP/IP Ports
Without LPD
Protocol
If the LPD protocol is not available, as in the case of Windows 95
networks, you must then configure the TCP/IP port yourself. In
order to do this, you must install a printer port and enter the port
number. In this case, such a port may also be called a direct printer
port.
TCP/IP Ports and
Logical Printers
The TCP/IP ports correspond to the logical printers (see also the
"Logical Printer" section on page 1-3). The following TCP/IP
ports are preset in your print server:
Port number Preset function Logical printer
9100 Default setting 1
9101 Changes Line Feed (LF) to Carriage Return with
Line Feed (CR+LF)
2
9102 Prints the status page as PostScript 3
9103 Prints a banner page in Novell networks or when
the LPD protocol is used
4
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