user manual

Glossary
GL-6
User Guide for Internetwork Performance Monitor
OL-11291-01
NMVT
Network Management Vector Transport. SNA message consisting of a series of vectors conveying
network management specific information.
NSPECHO
VTAM application running in the mainframe to support the IPM and SA Agent solution. NSPECHO
is used by IPM for measuring latency to the mainframe.
O
operation
Set of parameters used in measuring network performance statistics. The parameters specify the type
of measurement to be performed and many other parameters specific to the type of measurement
being taken.
P
Path Echo
Measures the total latency as well as the incremental latency for each hop in each path between the
source router and the target device. Path Echo is available only for the IP protocol.
physical unit
See PU.
ping
packet internet gropher. ICMP echo message and its reply. Often used in IP networks to test the
reachability of a network device.
PU
physical unit. SNA component that manages and monitors the resources of a node, as requested by
an SSCP. There is one PU per node.
Q
QoS
Quality of Service. Measure of performance for a transmission system that reflects its transmission
quality and service availability.
Quality of Service
See QoS.
R
request/response unit
See RU.
Response Time
Reporter
See SA Agent.
round-trip time
See RTT.
route
Path through an internetwork between a specific source and target.
router
Network layer device that uses one or more metrics to determine the optimal path along which
network traffic should be forwarded. Routers forward packets from one network to another based on
network layer information.