IBM E16RMLL-I - Tivoli Storage Manager, Implementation Manual, Page: 784 / 828

754
IBM Tivoli Storage Manager Implementation Guide
Managed resource A physical element to be
managed.
Management Information Base (MIB) A
logical database residing in the managed
system and defines a set of MIB objects. A
MIB is considered a logical database because
actual data is not stored in it, but rather
provides a view of the data that can be
accessed on a managed system.
MIB See Management Information Base.
MIB object A MIB object is a unit of
managed information that specifically
describes an aspect of a system. Examples
are CPU utilization, software name, hardware
type, and so on. A collection of related MIB
objects is defined as a MIB.
N
Network topology A physical arrangement
of nodes and interconnecting communications
links in networks based on application
requirements and geographical distribution of
users.
N_Port node port A Fibre Channel-defined
hardware entity at the end of a link that
provides the mechanisms necessary to
transport information units to or from another
node.
NL_Port node loop port A node port that
supports arbitrated loop devices.
O
Open system A system whose
characteristics comply with standards made
available throughout the industry, and
therefore can be connected to other systems
that comply with the same standards.
P
Point-to-point topology This consists of a
single connection between two nodes. All the
bandwidth is dedicated for these two nodes.
Port An endpoint for communication
between applications, generally referring to a
logical connection. A port provides queues for
sending and receiving data. Each port has a
port number for identification. When the port
number is combined with an Internet address,
it is called a socket address.
Port zoning In Fibre Channel environments,
port zoning is the grouping together of multiple
ports to form a virtual private storage network.
Ports that are members of a group or zone can
communicate with each other but are isolated
from ports in other zones. See also LUN
masking and subsystem masking.
Protocol The set of rules governing the
operation of functional units of a
communication system if communication is to
take place. Protocols can determine low-level
details of machine-to-machine interfaces,
such as the order in which bits from a byte are
sent. They can also determine high-level
exchanges between application programs,
such as file transfer.