多项选择题 Which two features protect the ERX Edge Router from denial-of-service attacks?（）

单项选择题 A customers application requires 30 virtual paths on a four port OC3 card. Which command allows this functionality?（）

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?（）