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问题描述 项目背景及网络拓扑 某集团公司在北京设有总公司，在广州和上海设有分公司，为了实现信息交流和资源共享，需要构建一个跨越三地的集团网络。总公司服务器区核心采用冗余信道连接，总部网络采用双出口，一路通过路由器接入城域网专用链路来传输业务数据流，另外一路接入互联网。分公司采用路由器接入互联网和城域 阅读全文
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**1. Suppose that a disk drive has 5,000 cylinders, numbered 0 to 4,999. The drive is currently serving a request at cylinder 2,150, and the previous 阅读全文
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1. Contrast the performance of the three techniques for allocating disk blocks (contiguous, linked, and indexed) for both sequential and random file a 阅读全文
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1. Consider a file system in which a file can be deleted and its disk space reclaimed while links to that file still exist. What problems may occur if 阅读全文
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1. Assume we have a demand-paged memory. The page table is held in registers. It takes 8 milliseconds to service a page fault if an empty page is avai 阅读全文
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8.1 – 请指出内部碎片与外部碎片的区别。 内部碎片是已经分配给进程的、比进程所需内存多出的部分，存在于分区内部，但是不能使用； 外部碎片是没有被分配出去的小的内存片段，却因不连续，而无法联合起来组成更大的内存片段分配给某个进程的部分。 8.3 – 给定6个内存分区：300KB、600KB、350 阅读全文
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**1 - Consider the traffic deadlock depicted in the following Figure. Show that the four necessary conditions for deadlock indeed hold in this example 阅读全文
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1 - The first known correct software solution to the critical-section problem for two processes was developed by Dekker. The two processes, P0 and P1, 阅读全文
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**1 - Discuss how the following pairs of scheduling criteria conflict in certain settings. CPU utilization and response time Average turnaround time a 阅读全文
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1 - Provide two programming examples in which multithreading does not provide better performance than a single-threaded solution. 一种是以串行操作为主的程序，例如对数字图 阅读全文