Cisco Certified Network Professional 2026 – 400 Free Practice Questions to Pass the Exam

The command that sets the maximum number of MAC addresses allowed on a port for port security is correctly identified as "switchport port-security maximum". This command helps network administrators define how many unique MAC addresses can access a specific switch port. By limiting the number of MAC addresses, it enhances security by preventing spoofing attacks and ensuring that only a specific number of devices can communicate through that port.

The use of "maximum" in the command explicitly indicates its purpose of specifying an upper limit, which is crucial for creating a robust security posture in a network environment. When this limit is reached, the port can either shut down, drop packets from unknown MAC addresses, or take other predefined actions, depending on additional configurations.

Understanding this command is vital as it provides a mechanism for controlling network access and maintaining the integrity of the network. In scenarios where unauthorized devices try to connect to the network, the setting ensures that the defined security policies are enforced effectively.