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《操作系统概念》
《操作系统概念》
作者:【美】西尔伯查茨 等 出版社:高等教育出版社
第14章 Protection
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题目
题型
Consider the ring protection scheme in MULTICS.If we were to implement the system calls of a typical operating system and stor
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The access-control matrix could be used to determine whethera process can switch from,say,domain A to domain B and enjoy the a
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Consider a system in which "computer games" can be played by students only between 10 P.M.and 6 A.M,by faculty membe
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What hardware features are needed for efficient capability manipulation? Can these be used for memory protection?
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Discuss thestrengths and weaknesses of implementing an access matrix using access lists that are associated with objects.
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Discuss the strengths and weaknesses of implementing an access matrix using capabilities that are associated with domains.
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Explain why a capability-based system such as Hydra provides greater flexibility than the ring protection scheme in enforcing
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Discuss the need for rights amplification in Hydra.How does this practice compare with the cross-ring calls in a ring protecti
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What is the need to-know principle? Why is it important for a protection system to adhere to this principle ?
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Discuss which of the follow ing systems allow module designers to enforce the need-to-know principle.
单选
Describe how the Java protection model would be sacrificed if a Java program were allowed to directly alter the annotations of
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How are the access-matrix facility and the role-based access-control facility similar? How do they differ?
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How does the principle of least privilege aid in the creation of protection systems ?
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How can systems that implement the principle of least privilege still have protection failures that lead to security violation
问答
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