多项选择题 An ATM PVC is configured as atm pvc 1 0 101 aal5snap 256 128 100 . Which three statements describe the traffic management characteristics of this interface?（）

单项选择题 Which command generates a BERT test pattern of all zeros on T1 number 1 for ten minutes?（）

单项选择题 Which command generates a BERT test pattern of alternating ones and zeros on T1 number 1 for one minute?（）