Selected Answer: B PPDIOO (Prepare, Plan, Design, Implement, Operate, Optimize). PPDIOO is a Cisco methodology that offers a structured and systematic approach to network lifecycle management. It is widely recognized and used in the industry to guide the design, implementation, and ongoing operation of network infrastructure. The PPDIOO lifecycle approach helps make sure networks are designed and implemented effectively, and that they keep meeting the changing needs of the organization over time.