单项选择题
Which command can be used from a PC to verify the connectivity between hosts that connect through a switch in the same LAN?（）
A.ping address B.tracert address C.traceroute address D.arp address
多项选择题 Which two benefits are provided by creating VLANs? （）
单项选择题 Refer to the exhibit. Which statement is true?（）
单项选择题 What dose a Layer 2 switch use to decide where to forward a received frame?（）
