Specifications

Mode 1s
1 User Modules
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NOTE
Horizontal arrows show direct access for control and
observation of parameters, counters, etc. Vertical
arrows show interfaces between layers for normal user
operations such as file access, down-line load, and
logical link usage.
Each layer in DNA consists of functional modules and protocols.
Generally, modules use the services of the next lower layer. In this
document,
the service relationship is demonstrated in the way the
interfaces are modeled, as calls to subroutines. Note that the
Network Management Layer interfaces directly with each of the lower