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61202156L2-1 TDU 120e User Manual A-1
Appendix A
Understanding SNMP
WHAT IS SNMP?
The term SNMP broadly refers to the message protocols
used to exchange information between the network and
the managed devices, as well as to the structure of net-
work management databases.
SNMP came about as local area network (LAN) environ-
ments became standardized over the past ten years and
multi-vendor equipment grew with competition. It be-
came necessary to manage the various vendor equipment
from a single control console. Thus, the SNMP emerged
as the standard for managing commercial TCP/IP net-
works.
Basic Components of SNMP
SNMP has three basic components: Network Manager,
Agent, and MIB.
Network Manager
This is a control program that collects, controls, and pre-
sents data pertinent to the operation of the network
devices. It resides on a network management station.
Agent
This is a control program that responds to queries and
commands from the network manager and returns
requested information or invokes configuration changes
initiated by the manager. It resides in each network
device.