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Consider a computer system with three users: Alice, Bob and Cindy. Alice owns the file alicerc, and Bob and Cindy can read it. Cindy can read and write the file bobrc, which Bob owns, but Alice can only read it. Only Cindy can read and write the file cindyrc, which she owns. Assume that the owner of each of these files can execute it. a) Create the corresponding access control matrix.
b) Cindy gives Alice permission to read cindyrc, and Alice removes Bob's ability to read alicerc. Show the new access control matrix.
c) Show the access control list for the latter scenario (you do not need to draw a diagram - just list the different entries).
Bridges perform both in the data link layers and physical of LANs of same kind. They split a bigger network in to smaller segments. They have logic that accept them to store the
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Problem (a) As a forensic investigator, you are needed to trace the source of an email. It is suspected that the email header has been forged. Show how you would proceed to
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In the early days when there were some dozen computers machine on the network, it was done individually but now as we have looked that there are millions of computers on the intern
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