Hirschmann RS20 Reference Manual page 554

Glossary
autonomous system—or ISP—in
order to simplify and improve IP-
packet exchange. MPLS gives
network operators a great deal of
flexibility to divert and route traffic
around link failures, congestion, and
bottlenecks. From a QoS standpoint,
ISPs will better be able to manage
different kinds of data streams
based on priority and service plan.
For instance, those who subscribe to
a premium service plan, or those
who receive a lot of streaming media
or high-bandwidth content can see
minimal latency and packet loss.
When packets enter into a MPLS-
based network, Label Edge Routers
(LERs) give them a label (identifier).
These labels not only contain
information based on the routing
table entry (i.e., destination,
bandwidth, delay, and other
metrics), but also refer to the IP
header field (source IP address),
Layer 4 socket number information,
and differentiated service. Once this
classification is complete and
mapped, different packets are
assigned to corresponding Labeled
Switch Paths (LSPs), where Label
Switch Routers (LSRs) place
outgoing labels on the packets. With
these LSPs, network operators can
divert and route traffic based on
data-stream type and Internet-
access customer.
MT-RJ connector. A type of fiber-
optic cable jack that is similar in
shape and concept to a standard
telephone jack, enabling duplex
CLI L2P
Release 7.0 05/2011
fiber-optic cables to be plugged into
compatible devices as easily as
plugging in a telephone cable.
MUX. See "Multiplexing" on
page 553.
N
NM. Network Module.
nm. Nanometer (1 x 10e
NP. Network Processor.
O
Open Systems Interconnection.
OSI is a seven (7) layer architecture
model for communications systems
developed by the ISO for the
interconnection of data
communications systems. Each
layer uses and builds on the
services provided by those below it.
Operating System Application
Programming Interface. OSAPI is
a module within the System Support
software that provides a set of
interfaces to OS support functions.
OS. Operating System.
OSAPI. See "Operating System
Application Programming Interface"
on page 554.
OSI. See "Open Systems
Interconnection" on page 554.
9
) meters.
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