计算机网络期末考试计算题

抱歉，根据提供的引用内容，我无法回答计算机网络期末考试的计算题。引用是一串选择题的答案，引用和引用是关于IP地址和子网掩码的问题。如果您有具体的计算题需要解答，请提供相关的问题和数据，我将尽力帮助您解答。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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