多项选择题
A.Ensure that the Ethernet encapsulations match on the interconnected router and switch ports.
B.Ensure that cables A and B are straight-through cables.
C.Ensure cable A is plugged into a trunk port.
D.Ensure the switch has power.
E.Reboot all of the devices.
F.Reseat all cables.
单项选择题 Which port state is introduced by Rapid-PVST?（）
单项选择题 Refer to the exhibit.HostA cannot ping HostB.Assuming routing is properly configured,what could be the cause of this problem?（）
单项选择题 Refer to the exhibit。A problem with network connectivity has been observed.It is suspected that the cable connected to switch port Fa0/9 on Switch 1 disconnected.What would be an effect of tis cable being disconnected?（）