What is the safest way to prevent an XXE attack?

What is the safest way to prevent an XXE attack?

• Use SSL encryption on all traffic between the server and external clients.
• Use Pass phrases instead of a password.
• Disable XML external entity and DTD processing in the application.
• Use hardened passwords with a minimum of 12 characters.

Explanation: An XXE attack can be prevented by disabling XML external entity and DTD processing in the application.

Exam with this question: IoT Security 1.1 Chapter 5 Quiz Answers