Quick Answer

The correct order of the PPDIOO network lifecycle phases is Prepare, Plan, Design, Implement, Operate, and Optimize. This sequence is technically sound because it begins with high-level business requirements and resource assessment in the Prepare phase, moves through structured planning and detailed design, then transitions into deployment and testing during Implement, followed by ongoing monitoring and maintenance in Operate, and finally closes the loop with performance analysis and improvements in Optimize. On the ENCOR 350-401 exam, this drag-and-drop question tests your understanding of Cisco’s structured lifecycle methodology, often appearing alongside scenario-based items where you must identify which phase a given activity belongs to. A common trap is confusing Operate with Optimize, or placing Plan after Design; remember that you cannot design without a plan. To lock in the order, use the mnemonic “P-P-D-I-O-O” or the phrase “People Plan Designs, Implement, Operate, Optimize.”