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P-202H Plus v2 Support Notes
The Internet Management Model is as shown in figure 1. Interactions between
the NMS and managed devices can be any of four different types of commands:
1. Reads
Read is used to monitor the managed devices, NMSs read variables that
are maintained by the devices.
2. Writes
Write is used to control the managed devices, NMSs write variables that
are stored in the managed devices.
3. Traversal operations
NMSs use these operations to determine which variables a managed
device supports and to sequentially gather information from variable tables
(such as IP routing table) in managed devices.
4. Traps
The managed devices to asynchronously report certain events to NMSs
use trap.
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