单项选择题
A.A
B.B
C.C
D.D
多项选择题 Which two services protect the ERX Edge Router from unauthorized CLI logins?（）
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?（）
