Which of the following ensures the MOST secure access to a server room？（）A、 ID card readersB、 Server rack doorsC、 Biometric devicesD、 Locked doors
题目
Which of the following ensures the MOST secure access to a server room？（）
- A、 ID card readers
- B、 Server rack doors
- C、 Biometric devices
- D、 Locked doors