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2.3. Which of the following are correct for 10Base5 Ethernet ?下列哪些對10Base5乙太網路的敘述是正確的?
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| (a)The maximum length of a segment is 100 meters 一個網段長度最大為100公尺 | |
| (b)The maximum length of a segment is 500 meters 一個網段長度最大為500公尺 | |
| (c)The speed is 5 Mbps 網路速度為5Mbps | |
| (d)The speed is 10 Mbps 網路速度為10Mbps | |
| (e)Baseband transmission 使用基頻傳輸 |
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2.4. Which of the following components are used in 10Base5 Ethernet ?下列哪些元件為10Base5乙太網路所使用 ?
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| (a)Transceivers 收發器 | |
| (b)Terminators 終端器 | |
| (c)Optical Fiber 光纖 | |
| (d)Repeaters 中繼器 | |
| (e)Coaxial cable 同軸電纜 |
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2.5. Which of the following statements are correct for “repeaters” used in 10Base5 Ethernet ?下列哪些對於在10based5乙太網路使用的 ”中繼器” 的敘述是正確的?
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| (a)It’s a device that forwards analog signals 此設備是用來傳送類比訊號 | |
| (b)It’s device that forwards digital signals 此設備是用來傳送數位訊號 | |
| (c)It’s a layer 2 device since it will forward a frame based on the MAC address 其為網路第二層設備,因為它是依據MAC地址來決定如何轉送 | |
| (d)It’s a layer 1 device since it only forwards signals without dealing with the MAC address of a frame. 其為網路第一層設備,因為它只是轉送訊號而不管訊框中的MAC地址 | |
| (e)The maximum number of repeaters allowed to install between any pair of nodes is less than 3. 任何兩個節點之間的路線上最多可以有三個中繼器 |
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2.6. Which of the following statements are correct for 10Base5 Ethernet with multiple segments ?下列哪些對於 多網段10Baesd5以乙太網路的敘述是正確的?
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| (a)All nodes are in the same collision domain 所有節點皆在同一碰撞區域 | |
| (b)Only the nodes in the same segment are in the same collision domain. 只有在同一網段上的節點才會在同一碰撞區域 | |
| (c)The maximum network length is around 2500 meters 整個網路最大長度約為2500公尺 | |
| (d)The maximum network length is around 1000 meters. 整個網路最大長度約為1000公尺 | |
| (e)The maximum number of connected segments is 5. 結接的網段數量最多為5 |
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2.7. Which of the following statements are correct for “Manchester encoding” used by 10Base5 Ethernet ?下列哪些對於10Base5乙太網路中使用的 ”曼徹斯特編碼” 的敘述是正確的?
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| (a)Each bit has a transition in the beginning of the bit 在每一個位元的開始就會有電位變化 | |
| (b)Each bit has a transition in the middle of the bit 在每一個位元的中間會有電位變化 | |
| (c)Each bit has two transitions 每一位元都會有兩次電位變化 | |
| (d)Used to synchronize the clocks in sending and receiving nodes 用來讓傳送端節點和接受端節點的clocks 可以同步 | |
| (e)For a 100 consecutive bits of “1”, the signal in the cable looks like a “high level” of 100 bit times. 對於連續100個位元的“1”,在電纜中的訊號看起來像一個長度為100位元時間的“高電位”訊號 |