A Chief Information Officer (CIO) wants to implement a cloud solution that will satisfy the following requirements:
✑ Support all phases of the SDLC.
✑ Use tailored website portal software.
✑ Allow the company to build and use its own gateway software.
✑ Utilize its own data management platform.
✑ Continue using agent-based security tools.
Which of the following cloud-computing models should the CIO implement?