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

D.
Assess current network infrastructure and installed applications.

E.
Complete the high-level design discovery checklist.

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