When identifying hardware and software products, features and functionalities for a routing and switching solution, which three tasks are performed prior to producing a documented high-level design for the customer? (Choose three.)

A.
Identify, analyze and document existing network vulnerabilities

B.
Verify that the chosen hardware and software platforms, features and functionalities will meet the preliminary high-level design objectives

C.
Complete the high-level design discovery checklist

D.
Research and identify hardware and software products, features and functionalities that will address the business and technical requirements for the customer

E.
Identify and assess the operations requirements for the routing and switching solution

F.
Assess current network infrastructure and installed applications