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Glossary
RARP
Glossary-5
RARP
Routing Address Resolution Protocol. RARP allows a node to broadcast a
message asking for an IP address given its hardware address. If a RARP server
has been configured to reply to this node, it will tell the node what its IP
address should be. Note that RARP provides less information than BOOTP,
but is more widely implemented.
repeater
A network device that repeats signals from one cable onto one or more other
cables, while restoring signal timing and waveforms. Repeaters are the most
common way to connect local networks together, and can provide either
Thinwire or Thickwire connections. They are commonly used to create larger
local networks up to a certain limit based on the number of repeaters and the
length of the cables.
RFC
Request For Comments. An RFC is a standard document describing protocols,
systems, or procedures used by the Internet community. For example, the IP
network protocol is detailed in an RFC (RFC 791), as are SNMP, TCP, Finger,
BOOTP, and the Domain name system. Information on obtaining RFCs is
available from [email protected].
RIP
Routing Information Protocol. RIP packets, along with SAP packets, allow the
Server to broadcast its known routes and services to the network and obtain this
information from other routers on the network.
Rlogin
An application that provides a terminal interface between (usually UNIX)
hosts using the TCP/IP network protocol. Unlike Telnet, Rlogin assumes the
remote host is or behaves like a UNIX machine. Rlogin can also be configured
to disable login password checking, so should be used with care. See your
host’s documentation, especially regarding the .rhosts and hosts.equiv files, for
more information.
ROM
Read-Only Memory. This kind of memory device retains its information even
when its power source is removed. A ROM version of the Server does not need
to download code, since it carries the entire executable code in ROM.
Frequently the ROM is provided as flash ROM, which can be reprogrammed
if the software needs to be updated.
router
Hosts on large networks that are connected to more than one network and route
messages to the correct destination nodes. Routers may send an incoming
message to an adjacent network if they do not know the destination host by
name, or they may send it right to the intended destination. On cross-country
networks, a message may go through several routers before arriving at its final
destination.