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搜题
【单选题】
If a switch receives a frame and the source MAC address is not in the MAC address table but the destination address is, what will the switch do with the frame?A.
Discard it and send an error message back to the originating host
B.
Flood the network with the frame
C.
Add the source address and port to the MAC address table and forward the frame out the destination port
D.
Add the destination to the MAC address table and then forward the frame
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举一反三
【单选题】执行下列语句后,在屏幕上显示的结果是 ________ 。 Dimension a(3) a(3)=8 a=5 a(1)=6 ?a*a(3)
A.
40
B.
25
C.
30
D.
错误信息