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a. If a password to a cipher is exactly 8 characters long, and each character can be selected from [0-9], [a-z], and [A-Z], how many different passwords are possible?
b. Suppose a system requires passwords be 8 characters long, include at least one capital letter, at least one digit and at least one character from the set of 5 special characters { !,#,%,&,*} . What advantage does this provide an attacker who is trying to guess a password?
What is usage of Sequence Number in Reliable Transmission? The protocol specifies that frames need to be numbered. This is done by using sequence numbers. A field is added to t
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This code properly implements the IP checksum function on a 32-bit machine: unsigned short cksum(unsigned short *buf, int count) { unsigned long sum = 0; while (count--) { sum += *
Write a report on your chosen topic that has been approved by your Lecturer. Your report should include appropriate figures, about 2000 words. Topics: 1 MAN- Metro Ethernet 2 Inte
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Question: The input to the circuit in the figure is a square wave that is symmetrical about 0V. Sketch the output waveform.
Q Illustrate Return to Zero encoding? - In NRZ-I long strings of 0s may still be a problem - May comprise synchronization as part of the signal for both 1s and 0s - How?
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