Network access controls (NACs) restrict a user’s ability to view or change details on a network by requiring both authorization and authentication. These controls are implemented through enterprise policies that tell the network specifically what traffic is authorized to enter the system and how.
Examples of access controls include:
Having an allowlist or blocklist of permissible IP addresses on the company network
Requiring passwords for each endpoint device connected to the company network
Practicing least privilege access so users can enter the network only if they absolutely need access to do their job effectively