Hirschmann RS20 Reference Manual page 556

Glossary
R
Real-Time Operating System.
RTOS is a component of the OSAPI
module that abstracts operating
systems with which other systems
can interface.
RFC. Request For Comment.
RMON. Short for remote
monitoring, a network management
protocol that allows network
information to be gathered at a
single workstation. Whereas SNMP
gathers network data from a single
type of Management Information
Base (MIB), RMON 1 defines nine
additional MIBs that provide a much
richer set of data about network
usage. For RMON to work, network
devices, such as hubs and switches,
must be designed to support it. The
newest version of RMON, RMON 2,
provides data about traffic at the
network layer in addition to the
physical layer. This allows
administrators to analyze traffic by
protocol.
RP. Rendezvous Point. Used with
IP Multicast.
RPU. Remote Power Unit.
RTOS. See "Real-Time Operating
System" on page 556.
S
SDL. Synchronous Data Link.
CLI L2P
Release 7.0 05/2011
Simple Network Management
Protocol. SNMP is the protocol
governing network management and
the monitoring of network devices
and their functions. It is not
necessarily limited to TCP/IP
networks. The versions have the
following differences:
SNMPv1 (full): Security is based on
community strings.
SNMPsec (historic): Security is based
on parties. Few, if any, vendors
implemented this version of the
protocol, which is now largely
forgotten.
SNMPv2p (historic): For this version,
much work was done to update the
SNMPv1 protocol and the SMIv1,
and not just security. The result was
updated protocol operations, new
protocol operations and data types,
and party-based security from
SNMPsec.
SNMPv2c (experimental): This
version of the protocol is called
community string-based SNMPv2. It
is an update of the protocol
operations and data types of
SNMPv2p, and uses community-
based security from SNMPv1.
SNMPv2u (experimental): This
version of the protocol uses the
protocol operations and data types
of SNMPv2c and security based on
users.
SNMPv2* (experimental): This
version combined the best features
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