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Consider a long sequence of accesses to a disk with 8 ms average seek time, 3 ms average rotational delay, and a data transfer rate of 60 Mbytes/sec. The average size of a block being accessed is 64 Kbytes. Assume that each data block is stored in contiguous sectors.
(a) Assuming that the blocks are randomly located on the disk, estimate the average percentage of the total time occupied by seek operations and rotational delays.
(b) Suppose that 20 blocks are transferred in sequence from adjacent cylinders, reducing seek time to 1 ms. The blocks are randomly located on these cylinders. What is the total transfer time?
Use the case study material as a requirement. We will concentrate improving services that were built in project 3 by adding the following:
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A site with a netid of 126.5.0.0/16 uses 20 subnet routers. Suggest a suitable network mask for equally sized subnets, which allows for a degree of expansion in the future. Give an example of a host IP address at this site.
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A brief description (a paragraph of 100-200 words) providing the project background/context. e.g. is it based on a business need? a technical need? does it arise from the interests of a particular person/company?
Other than the two basic types of computer crimes above, what non-computer crimes might a computer forensics examiner get involved with, and how?
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Research options for improving the current use of TCP/IP and recommend new software and equipment that's available. Describe how use of equipment, software, and multiplexing could aid in improving use for communications which would reduce network con..
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