多项选择题
A.A chassis cluster consists of two devices.
B.A chassis cluster consists of two or more devices.
C.Devices participating in a chassis cluster can be different models.
D.Devices participating in a chassis cluster must be the same models
多项选择题 Whatarethreebenefitsofusingchassisclustering？（）
单项选择题 Regardingsecuretunnel（st）interfaces，whichstatementistrue？（）
单项选择题 Which command is needed to change this policy to a tunnel policy for a policy-based VPN？（） [edit security policies from-zone trust to-zone untrust] user@host# show policy tunnel-traffic { match { source-address local-net； destination-address remote-net； application any； then { permit； } }