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The SDLC "Spiral Model" is considered a __________ because it incorporates the classic Water Fall model.
iterative-model
metamodel
nested-model
encapsulated-model
See page 848 of the SYBEX "Official Study Guide" 7th Edition,; "the spiral model encapsulates a number of iterations of another model (the waterfall model), it is known as a metamodel, or 'model of models.'" The CISSP CBK, 4th edition, p 964 calls it a "sort of nested version of the waterfall method", but metamodel is the "best" answer.
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