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Appendix A: Glossary
A-13
PDT. Printer Definition Table. A PDT bypasses both AS/400 and Windows printer drivers;
however, a PDT cannot print AS/400 office documents with embedded images and cannot print
AFP documents
Peer-to-Peer. 1. A LAN in which nodes communicate with each other without the need for a
file server. 2. A new protocol for peer-to-peer communications that is included with Windows
95 (also known as Direct Mode IPX).
Physical Layer. Layer 1 of the OSI Reference Model; defines the physical and electrical con-
nection to the network.
Ping. A TCP/IP command utility. The ping command sends test information to another device
and waits for the information to return. The ping command accepts one parameter, the IP address
or host name of the remote system to send/receive the data. The utility displays the amount of
data sent and received and the amount of time elapsed while doing so. The ping utility is very use-
ful when testing the TCP/IP configuration.
PJL. Page Job Control Language. PJL is an industry standard printer job control language
originally developed by Hewlett-Packard. PJL is independent of the page description language.
HP-PJL is used to encapsulate the user jobs to provide job and printer control information. PJL
can be viewed as functioning above the level of other printer languages.
POP3. Post Office Protocol. The most recent protocol used to retrieve E-mail from the server.
Port. A logical channel or channel endpoint in a communications system. The TCP and UDP
transport layer protocols used on Ethernet use port numbers to distinguish between (demultiplex)
different logical channels on the same network interface on the same computer. IntelliBar AS Net
print servers use port 9100 for PCL printing and port 5001 for IPDS printing.
Portrait mode. Printing a document with the short edge of the paper at the top (the normal
method of printing).
PPD. See Printer Description File.
PPL. An ANSI-standard page description language originally used in the DEC LN03 laser
printer.
Printcap File. The file on a UNIX host computer (usually in the /etc directory) that contains a
list of printers.
PRINTCON. A NetWare utility program for defining the characteristics of the print job.