Company A and Company B both supply contractual services to a fast paced and growing auto parts
manufacturer with a small local Area Network (LAN) at its local site. Company A performs in-house billing and
invoices services for the local auto parts manufactacturer. Company B provides in-house parts and widgets
services for the local auto parts manufacturers. Which of the following is the BEST method to mitigate security
risk within the environment?

A.
Virtual Private Network

B.
Role-Based access

C.
Network segmentation

D.
Public Key Infrastructure