What is the purpose of the Frame Check Sequence (FCS) in a frame trailer?
What will be an ideal response?
The FCS field is used to determine if errors occurred in the transmission and receipt of a
frame. The FCS field is necessary because the signals on the medium are subject to interfer
ence, distortion, or loss that would change the bit values that those signals represent.
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Explain how the use of the secure hash of an object to identify and route messages to it ensures that it is tamper-proof. What properties are required of the hash function? How can integrity be maintained even if a substantial proportion of peer nodes are subverted?
What will be an ideal response?
Which of the following is not true of PGP?
a) It is a public-key encryption system that encrypts e-mail and files. b) It can provide digital signatures. c) It is based on a “web of trust.” d) It authenticates all users of PGP to all other users.
Both column chart and bar charts are good choices for illustrating comparisons among items
Indicate whether the statement is true or false
How would you reset your preferences to the default settings?
What will be an ideal response?