課程影片與練習

課程簡介
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)
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
1.27.Which of the following statements are correct for the “transport layer” in the OSI 7-layer model ? 
     下列哪些對於OSI 七層架構中”傳輸層”的敘述是正確的?
(a)It deals with the problem of how to transmit packets between a pair of processes in different hosts. 它負責處理如何在不同主機上一對行程間的封包傳輸問題。
(b)The User Datagram Protocol (UDP) is a transport layer protocol that provides reliable transmission service. UDP協議是一個提供可靠傳輸服務的傳輸層協議。
(c)The Transmission Control Protocol (TCP) is a transport layer protocol that provides reliable transmission service. TCP協議是一個提供可靠傳輸服務的傳輸層協議。
(d)Routers usually not implement transport layer protocols. 路由器通常不實作傳輸層協議。
(e)Transport layer protocols usually are only implemented in end hosts. 傳輸層協議通常只實作在終端主機上。

1.28.Which of the following are the main features of the Internet Architecture ?  
     下列哪些是互聯網架構的主要特色?
(a)Strict layering. The layer N protocol is only allowed to use the services provided by layer N-1 protocol. 嚴格分層。第N層協議只允許使用由N-1層協議所提供的服務。
(b)Not strict layering. The layer N protocol is allowed to use the services provided by layer N-2 protocol or other underlying protocols directly. 不嚴格分層。第N層協議允許使用由N-2層或更底層協議所提供的服務。
(c)An hour-glass shape of protocols and IP serves as the focal point for the architecture 為沙漏狀架構, 而 IP 協議為此結構的中心點。
(d)An hour-glass shape of protocols and TCP/UDP serves as the focal point for the architecture. 為沙漏狀架構, 而 TCP/UDP協議為此結構的中心點。
(e)In order for a new protocol to be officially included in the architecture, there needs to be both a protocol specification and at least one representative implementations of the specification. 為了在此架構上新增加一個協議,我們需要同時具備一個協定規範與至少一個代表性的實作。

資料處理中...
檔案上傳中...