Answer:
c. Use an agentless implementation.
Step-by-step explanation:
A VPN is an acronym for Virtual Private Network and it's a secured, encrypted and private web-based service used for accessing region-restricted and censored internet content. A VPN protects web data from potential hackers and government surveillance by hiding the real IP address of the host and encrypting user's internet traffic.
Basically, the VPN is a computer software that enables internet users to create a secured connection (sends and receives data) over public or shared networks like they're directly connected to the private network.
In this scenario, a security administrator is adding a network access control (NAC) requirement for all vpn users to ensure the connecting devices are compliant with company policy. The item which provides the highest assurance to meet this requirement is to use an agentless implementation because the network access control (NAC) codes do not reside on the host device and the end user does not have to download any link to use it.