单项选择题
What dose a Layer 2 switch use to decide where to forward a received frame?（）
A.source MAC address B.source IP address C.source switch port D.destination IP address E.destination port address F.destination MAC address
单项选择题 At which layer of the OSI model is RSTP used to prevent loops?（）
多项选择题 Which three statements about RSTP are true?（）
单项选择题 Refer to the exhibit A frame on vlan 1 on switch s1 is sent to switch s2 when the frame is received on vlan 2,what causes this behavior?（）
