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##软件定义网络：逻辑集中控制 ###Main Contribution OpenFlow=标准化模型 OpenFlow=与交换机交互的标准化协议 下载流表条目、查询统计信息等 通过单个实体进行逻辑集中控制的概念（“SDN控制器”） 简化控制平面 例如，在一个位置（控制器）计算最优路径，而不是等待分 阅读全文
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WEEK8 WEEK9 CONCLUSION1 CONCLUSION2 阅读全文
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##Hiding Date from Ohters 信息安全的CIA三要素: Confidentiality（保密性） Integrity（完整性） Availability（可用性） Plaintext（明文）是指待加密的信息 Ciphertext（密文）是明文加密后的版本 明文转换为密文称作En 阅读全文
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#Internet History, Technology, and Security From the birth of computer, to the development of network, to the introduction of network security ##Histo 阅读全文
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##Week9——Security: Web Security 1. Which of the following is false about the two keys used in public key encryption? If you have the public key it is 阅读全文
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##Week8：Security : Encrypting and Signing 1. Which of the following is true of security? Perfect security is achievable and requires a trade-off with 阅读全文
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OpenFlow论文有感 Internet History, Technology, and Security课程学习第二周总结 阅读全文
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Week7 Week6 Week5 Week4 Week3 阅读全文
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##Week7-Application Layer 现在有两个基本问题需要应用层解决 其一是 那个应用将获得数据 ,这个问题通过一个叫做端口的机制解决 What does the Application Layer expect from the Transport Layer? A reliabl 阅读全文
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the Link Layer,IP Layer,Transport Layer What part of data transfer does TCP solve, and what part does IP solve? The reliability of data transmissions, 阅读全文