Technical data

resolver
A mechanism or process to correlate a network host name into an appropriate
network address in support of network applications; a network name resolver. See
BIND resolver.
reserved port
An assigned port that provides services to unknown callers by providing a service
contact point; reserved port numbers range from 1 to 255.
resynchronization
A process that enables the recovery of user information lost or corrupted during
transfer across an association. Sets the association back to the state it was in at a
specified point in the transfer.
retransmission
A method of error recovery in which stations receiving messages acknowledge
the receipt of correct messages and, on receipt of incorrect messages, either do
not acknowledge or acknowledge in the negative. The lack of acknowledgment
or receipt of a negative acknowledgment indicates to the sending station that it
should transmit the failed message again.
Reverse Address Resolution Protocol (RARP)
The TCP/IP protocol that provides the reverse function of ARP. This protocol maps
a physical (hardware) address to an IP address. Often used by diskless nodes when
they first initialize to find their Internet address.
reverse domain
An Internet domain that BIND servers use to map IP addresses to domain names.
RFC
See Request for Comments.
RFC 822
The TCP/IP standard format for electronic mail message headers; often referred to
as "822 messages". The name comes from RFC 822 that contains the specification;
previously known as 733 format.
RIB (routing information base)
routing database
RIP
See Routing Information Protocol.
rlogin
Remote login: The Berkeley 4.3 BSD service that allows users of one machine to
connect to other systems across the Internet and interact as if their terminals
are connected the machines directly.
RMS
See Record Management Services.
RMT/RCD
Remote command that allows remote users to access magnetic tapes and CD drives.
root
The top level directory in a UNIX-styl
e file system; also used to indicate a user (the
superuser) who has special privilege
s. See superuser.
root mode
The file protection placed on a container file when it is created.
Glossary–38