问题
单项选择题
When a bridge transmits an Ethernet frame, the Ethernet frame has （）.
A．the broadcast address for the its source address
B．the bridge's LAN address for its destination address
C．the bridge's LAN address for its source address
D．none of the above
答案
参考答案：D
解析：
本题中选项A．B．C的说法都不正确，所以选择答案D(意思是以上说法不对)正确。