Maxtor MaxAttach NAS 4100 Guia do Utilizador Página 102

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96
does not need to run on the same host as the
SNMP agent.
The SNMP management system requests infor-
mation from a managed computer (called an
SNMP agent) such as the amount of hard disk
space available or the number of active sessions.
The SNMP management system can also initiate
a change to the configuration of an SNMP agent.
However, this is rare because most clients have
read-only access.
An SNMP agent.
The SNMP agent responds to SNMP manage-
ment system requests for information. Any com-
puter running SNMP agent software is an SNMP
agent. The Windows 2000 SNMP service, which
is agent software, responds to information
requests from one or more management systems.
The SNMP service can be configured to deter-
mine which statistics are tracked and which man-
agement systems are authorized to request
information.
In general, SNMP agents do not originate mes-
sages, but only respond to them. A trap message
is the only agent-initiated SNMP communica-
tion. A trap is an alarm-triggering event on an
agent, such as a system reboot or illegal access,
which provides enhanced security.
Management hosts and agents belong to an SNMP
community, which is a collection of hosts grouped
together for administrative purposes. Defining
communities provides security by allowing only
management systems and agents within the same
community to communicate.
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