How does port security function in a network?

Port security functions by controlling access to physical ports on networking devices, such as switches and routers. This security measure is implemented to prevent unauthorized devices from connecting to the network.

When port security is configured, it can limit the number of devices that can connect to a specific port, ensuring that only authorized devices are permitted access. This is typically achieved through measures such as MAC address filtering, where only devices with specific MAC addresses are allowed to communicate through that port.

By restricting access at the port level, organizations can enhance their overall security posture, reduce the risk of unauthorized access, and protect sensitive data from being intercepted or compromised. This function is essential in environments where network security is paramount, such as in enterprise networks or data centers.

Other options, while related to network security, do not focus specifically on how port security operates in terms of access control at the physical layer.