課程影片與練習
課程簡介
第1週：網路架構與七層參考模式簡介
第2週：IEEE 802.3 乙太網路 (Ethernet)
第3週：IEEE 802.11 無線區域網路 (Wireless LAN)
第4週：IEEE 802.1D 交換機的擴張樹演算法 (Spanning Tree Algorithm)
第5週：IEEE 802.1Q 虛擬區域網路 (Virtual LAN)
※觀看影片請點擊影片名稱後方的"YOUTUBE"或"YOUKU"，
觀看YOUKU影片，請輸入密碼：mooc01004
第6週：區域網路可靠傳輸技術 －－ 滑動視窗技術
第7週：路由器運作原理以及網路互連技術
第8週：TCP 與網路阻塞偵測與控制技術
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5.1. Which of the following statements are correct for a layer 2 network that consists of stations connected by switches/bridges ? 對於由交換機/橋接器以及連接的主機所組成的第二層網路，下列敘述何者正確? |
| (a) A layer 2 network is a broadcast domain which means that when a station sends a broadcast frame, the frame will be forwarded to all stations. 第二層網路是一個廣播網域，也就是說主機送出一個廣播訊框時，此訊框將會被傳送到所有其他主機 | |
| (b) A multicast frame will also be forwarded to all stations. 群播訊框也會被傳送到所有主機 | |
| (c) A multicast frame will only be forwarded to all the members of the multicast group. 群播訊框只會被傳送至該群播群組內的成員 | |
| (d) A unicast frame will only be forwarded to its destination station 單播訊框只會被傳送到目的地主機 |
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5.2. What are the correct ways for a switch/bridge to handle received frames ?當交換機/橋接器接收到訊框時, 下列哪些處理訊框的方法是正確的 ? |
| (a) A switch/bridge only receives frames detinated to the switch/bridge.交換機/橋接器只會接收目的地地址為自己的訊框 | |
| (b) A switch/bridge receives and handles all frames coming into its ports. 交換機/橋接器接收並處理所有由其連接埠進入的訊框 | |
| (c) A switch/bridge handles a received frame by store-and-forward mechanism. 交換機/橋接器依據 ”儲存與轉送” 的機制來處理收到的訊框 | |
| (d) A switch/bridge forwards a received frame by looking up the destination MAC address of the frame. 交換機/橋接器依據訊框 “目的地MAC位址” 傳送訊框 | |
| (e) A switch/bridge forwards a received frame by looking up the source MAC address of the frame. 交換機/橋接器依據訊框 “來源MAC位址” 傳送訊框 |
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