For the _________ model, the security boundary may be defined for the vendor to include the software framework and middleware layer. May 7, 2021 by admin Question: For the _________ model, the security boundary may be defined for the vendor to include the software framework and middleware layer. A. SaaS B. PaaS C. IaaS D. All of the mentioned Answer» b. PaaS Note: The above multiple-choice question is for all general and Competitive Exams in India.