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Section IV - TCP/IP
OKI OkiLAN 6010e User’s Guide
Address Formats
Network hardware addresses are 48-bits and are ex-
pressed in 6 bytes in hexadecimal format usually sepa-
rated by colons. Each hexadecimal byte has a range
from 00 to FF.
Example: 00:02:16:17:50:A4
IP addresses are 32-bits and are expressed in 4 bytes in
decimal format usually separated by periods. Each
decimal byte has a range from 0 to 255.
Example: 192:168:42:55
Configuration Files
The purpose of RARP is to look up a 32-bit IP address
given a 48-bit network hardware address. The RARP
server (which is usually a UNIX workstation running a
rarpd daemon) performs this function using two con-
figuration files and one or more daemons. The configu-
ration files are “/etc/hosts” and “/etc/ethers” and the
daemon is called rarpd. A name can be assigned to any
device on a network and is arbitrary. For the following
examples the name used for the OkiLAN 6010e is
OKIPRINTER. Remember that this name is arbitrary; a
customer can assign any name.
/etc/hosts: The “/etc/hosts” file is where each entry
maps a host name to an IP address. An
example entry is shown below.
192.168.42.55 OKIPRINTER