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2.1. Which of the following topology is used by traditional Ethernet ?下列哪種拓墣為傳統乙太網路中常使用?
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| (a)Ring 環 | |
| (b)Star 星形 | |
| (c)Mesh 網狀 | |
| (d)Bus 匯流排 | |
| (e)Tree 樹狀 |
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2.2. Which of the following features are correct for traditional Ethernet 下列對傳統乙太網路特性的敘述何者為正確?
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| (a)The receiver will send an ACK to sender if a frame is received correctly. 接收端成功正確收到訊框後,會送一個回覆(ACK)給發送者 | |
| (b)The receiver will NOT send an NAK (negative acknowledgement) to sender even a received frame is not correct. 即使接收到的訊框有誤,接收者也不會送出訊框錯誤回覆(NACK)給傳送者。 | |
| (c)A connection must be established between the sender and the receiver before a frame is transmitted. 在傳送訊框之前,傳送端和接收端之間必須先建立連線 | |
| (d)No connection needs to be established before a frame is transmitted. 在訊框被傳送出去前,不需事先做連線 | |
| (e)At most one node is allowed to transmit at a time in order to avoid collision. 為了避免發生衝撞, 同時最多只能有一個節點可以傳送訊號 |