The advantages of modular network architecture include ______.

The advantages of modular network architecture include ______.
A . It replaces the traditional hierarchical network model and facilitates network planning and deployment.
B. Allow different application functions or application systems to share data, resources and capabilities, and participate in business processes.
C. It is allowed to dynamically invoke IT resources through open interfaces to realize a standard, compatible, safe, intelligent and manageable IT application environment.
D. Each module can be planned and deployed separately, and network functions can be added or removed by adding or deleting modules, which is conducive to building complex networks.

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Answer: D