A.Broadcast frames are never sent to swiches.
B.Broadcast addresses use an incorrect format for the switching table.
C.A broadcast address will never be the source address of a frame.
D.Broadcasts only use network layer addressing.
E.A broadcast frame is never forwarded by a switch.

A.邊際防火墻
B.狀態(tài)防火墻
C.軟件防火墻
D.應(yīng)用網(wǎng)關(guān)防火墻