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Appendix A. Understanding SNMP
61202156L2-1 TDU 120e User Manual A-3
Message
The network device issues two types of messages:
GetResponse
The response to a network manager G
ET
R
EQUEST
or
G
ET
N
EXT
R
EQUEST
command.
Trap
An unsolicited message issued by a network device to
report an operational anomaly or an alarm condition to
the network manager.
These messages are typically encased within informa-
tional packets and transported over the LAN or WAN
(wide area network).