多项选择题
A. request system software add
B. request system software downgrade
C. request system software replace
D. request system software rollback
单项选择题 Which command do you issue to upgrade the current software on Junos devices?（）
单项选择题 You issue the command telnet interface ge-1/1/0 10.10.10.1 source 192.168.100.1 bypass-routing. Which statement is correct?（）
单项选择题 You issue the ping interface t1-1/1/0 1.1.1.1 bypass-routing count 1000 rapid command. Which statement is correct?（）