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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 are the Advantages of adaptive routing (1) An adaptive routing method can improve performance, as realised by the network user. (2) An adaptive routing method can aid
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What is a pseudo tty? A pseudo tty or false terminal enables external machines to connect by Telnet or rlogin. Without a pseudo tty, no connection can take place.
Token Bus Physical order of stations doesn't matter Line is broadcast medium "Send" token by addressing neighbour Provisions for deleting, adding stations
Describe the term - Certification Authority The certification is most easily implemented with a custom solution combined with a server, called the Certification Authority (CA).
Q. Show the Drawbacks of Go-back-N? Drawbacks of Go-back- N - Inefficient - Every out of order received packets are discarded (receiver side is simplified) - This
What is the difference among flow control and error control? Ans) Flow control: adjust and confirm data flow rate for successful transmission. Error Control: a method to
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Recognize the command to view the configuration-register value Ans) show version is the command to view the configuration-register value
Q. What is Boundary Level Masking? If mask numbers are either 255 or 0: Bytes in the IP address that correspond to 255 in the mask will be repeated in the subnet ma
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