单项选择题
Which account is used to access a Junos device in factory-default configuration?（）
A.root B.admin C.juniper D.user
单项选择题 What must be configured prior to the first commit after factory defaults are loaded?（）
单项选择题 What represents the binary equivalence of 207?（）
单项选择题 Which two statements are true of a network mask?（）
