Port-based Network Access Control

Port-based Network Access Control (PNAC) is a security method used on wired or wireless networks to restrict device access based on the port they connect to. Think of each port like a gate; only authorized devices can pass through and communicate on the network. When a device connects, the network verifies its identity, and if approved, grants access. This helps prevent unauthorized users or devices from connecting, ensuring the network remains secure and only trusted devices can send or receive data. It’s a common security approach in corporate and institutional networks to control who can access sensitive information.