| Exam 300-070 | Question id=3581 | QoS Model | 
        Which three descriptions are true?
      
| A. | The class of service is a parameter that is used for traffic classification and marking at Layer 2. | |
| B. | The IP precedence is a parameter that is used for traffic classification and marking at Layer 2. | |
| C. | The differentiated services code point is a parameter that is used for traffic classification and marking at Layer 2. | |
| D. | The class of service is a parameter that is used for traffic classification and marking at Layer 3. | |
| E. | The IP precedence is a parameter that is used for traffic classification and marking at Layer 3. | |
| F. | The differentiated services code point is a parameter that is used for traffic classification and marking at Layer 3. |