What is the primary aim of the Cisco PDIOO model?

A.
To approach security as an ongoing concern

B.
To establish a lasting, thorough security policy

C.
To provide a framework for security application design

D.
To provide a guideline for making security decisions

Explanation:
Critical to the success of IP communications security is adherence to a well-thought-out and comprehensive security policy. The security policy should enforce the planning, design, implementation, operation, and optimization (PDIOO) approach. The PDIOO approach isan ongoing process that results in continual monitoring and improvement of IP communications security.
Reference:
http://www.cisco.com/en/US/partner/netsol/ns340/ns394/ns165/ns391/networking_solutions_design_guidance0