What is Cisco’s overall vision with respect to communications protocols?

A.
To design and architect end-to-end communications infrastructure using confusing
communication protocols.

B.
To design and architect end-to-end communications infrastructure using foreign communication
protocols.

C.
To design and architect end-to-end communications infrastructure using open standard
communication protocols.

D.
To design and architect end-to-end communications infrastructure using proprietary
communication protocols.