Focus exclusively on encrypting network traffic within the SDN environment, disregarding the security of the SDN controller and underlying infrastructure to minimize costs.

Assume the SDN controller's default security settings are sufficient for all scenarios, avoiding any additional security configurations to ensure ease of deployment.

Implement a comprehensive security strategy that addresses the unique challenges of SDN, including securing the SDN controller, encrypting network traffic, and ensuring robust access controls, while also considering cost-effectiveness.

Apply the same security measures used in traditional networking environments to the SDN solution, ignoring the distinct architectural differences and potential vulnerabilities specific to SDN.