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4.1 Assume a bridge receives a frame from port x, with destination MAC address D and source MAC address S. Which of the following statements about frame forwarding are NOT correct ? 假設一個橋接器由埠 X 接收到一個訊框,該訊框上的目的地 MAC 位址為 D 而其來源 MAC 位址為 S,下列關於該訊框轉送的敘述何者錯誤? |
| (a) The bridge will broadcast the frame to all ports if D is not found in the Filtering database of the bridge. 如果該 MAC 位址沒在橋接器的過濾資料庫中,則橋接器會將此訊框廣播到所有的埠. | |
| (b) The bridge will broadcast the frame to all ports, except port x, if D is not found in the Filtering database. 如果該 MAC 位址沒在橋接器的過濾資料庫中,則橋接器會將此訊框廣播到除了埠 X 以外所有的埠. | |
| (c) The bridge will filter the frame if D is found in the Filtering database and D belongs to port x. 如果該 MAC 位址有在橋接器的過濾資料庫中,則橋接器會將該訊框過濾掉,而 MAC 位址 D 屬於埠 X. | |
| (d) The bridge will forward the frame to port y, if D is found in the Filtering database and D belongs to port y. 如果該 MAC 位址在橋接器的過濾資料庫中且資料顯示它屬於埠 Y,則橋接器會將該訊框前送到埠 Y. |