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Appendix > Glossary
DHCP (Dynamic Host Configuration Protocol)
Dynamic Host Configuration Protocol (DHCP) that automatically resolves IP addresses, subnet masks, and 
gateway addresses on a TCP/IP network. DHCP minimizes the load of network management employing a large 
number of client computers because it relieves individual clients including printers from the IP address being 
assigned.
DHCP (IPv6)
DHCP (IPv6) is the next-generation of the Internet's Dynamic Host Configuration Protocol and supports IPv6. It 
extends the BOOTP startup protocol that defines the protocols used for transferring configuration information 
to hosts on the network. DHCP (IPv6) permits the DHCP server to use its expanded functionality to send 
configuration parameters to an IPv6 node. Because the network addresses that can be used are allocated 
automatically, the IPv6 node management workload is reduced in systems where the administrator has to 
exercise close control over IP address allocation.
dpi (dots per inch)
A unit for resolution, representing the number of dots printed per inch (25.4 mm).
EcoPrint Mode
A printing mode that helps save toner. Copies made in this mode are thus lighter than normal.
Emulation
The function to interpret and execute other printers' page description languages. The machine emulates 
operation of PCL6, KPDL3 (PostScript 3 compatible). 
FTP (File Transfer Protocol)
A protocol to transfer files on the TCP/IP network, whether the Internet or an intranet. Along with HTTP and 
SMTP/POP, FTP is now frequently used on the Internet.
Grayscale
A computer color expression. Displayed images of this sort are typically composed of shades of gray, varying 
from black at the weakest intensity to white at the strongest, without any other colors. Gray levels are displayed 
in numerical levels: that is, white and black only for 1 bit; 256 gray levels (including white and black) for 8 bits; and 
65,536 gray levels for 16 bits.
IP Address
An Internet protocol address is a unique number that represents a specific computer or related device on the 
network. The format of an IP address is four sets of numbers separated by dots, e.g. 192.168.110.171. Each 
number should be between 0 and 255.
IPP
IPP (Internet Printing Protocol) is a standard that uses TCP/IP networks such as the Internet to enable print jobs 
to be sent between remote computers and printers. IPP is an extension of the HTTP protocol used to view 
websites and enables printing to be carried out via routers on printers in remote locations. It also supports the 
HTTP authentication mechanisms along with TLS server and client authentication as well as encryption.
Job Box
The Job Box function stores print data on the printer and allows users to print single or multiple copies of the 
stored data later using the printer's operation panel.