单项选择题
Which interface is used for RTO synchronization and forwarding traffic between the devices in a cluster?（）
A. the st interface B. the reth interface C. the fxp1 and fxp0 interfaces D. the fab0 and fab1 interfaces
多项选择题 Which two packet attributes contribute to the identification of a session? （）(Choose two.)
单项选择题 On which component is the control plane implemented?（）
多项选择题 Which two statements are true about AH?（） (Choose two.)
