What is the difference between a network adapter and a network controller in KRU?

Question

Preparation of terms of reference

Good afternoon, I am writing technical specifications for system engineers, the items in KTR 26.20.15.000-00000001 "Data transfer rate of a wired network adapter" and "Data transfer rate of a network controller" raised questions, what is the difference?


And another question, if I indicate the presence of an output audio connector, but do not indicate the presence of a built-in audio controller, can the computer come without sound?