多项选择题
Which three statements are true of dynamic routing protocols?（）
A.They are scalable. B.They are Dijkstra based. C.They share network layer reach ability information among neighbors. D.They automate next hopdecisions. E.They are tolerant of configuration errors.
单项选择题 Which statement is correct about the validate option when upgrading JUNOS software?（）
单项选择题 Which command is a valid way to view the status of an interface?（）
单项选择题 On a Juniper router，what is the default file used for syslog messages？（）
