D-Link DES-1228P - Manual (Page 43)

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string. SNMP packets from a station that are not authenticated are
ignored (dropped).
Figure 26 – System > SNMP Setting
Enabled / Disabled: Default setting is Disabled. Click Enable, then
Apply, to set Community Settings.
The default community strings for the Switch used for SNMP v.1
management access are:
Public: The community with read-only privilege allows
authorized management stations to retrieve MIB objects.
Private: The community with read/write privilege allows
authorized management stations to retrieve and modify MIB
objects.
Trap Setting: Traps are messages that alert network personnel of
events that occur on the Switch. Such events can be as serious as a
reboot (someone accidentally turned the Switch OFF), or less serious