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Question:
(a) What is a script kiddie? Is it a significant security threat, and why?
(b) Assume that UNIX uses the user login name in lieu of the traditional salt, what is the effect on the security of the password?
(c) Explain the rationale behind the fact that many banks and credit card companies allow their customers to access their accounts from ATM machines using only 4 digits personal identification numbers (PIN).
(d) Consider Alice and Bob communicating. Compare the following two possible messages M1 and M2 sent by Alice. K is the secret key shared between Alice and Bob and K {m} denotes m encrypted using K.
M1: I'm Alice, K{timestamp} M2: I'm Alice, timestamp, hash{K, timestamp}
(i) What three security features are provided by M1 and M2?
(ii) Which message M1 or M2 is more secure and why?
Can you describe the concept of CDMA?
Difference between Authentication and Deauthentication Authentication: Used to establish the self of stations to each other. Deauthentication: This service is appealed whene
FRAME FILTERING: The very important task a bridge operates is frame filtering. If both the destination and source are on the same segment, it does not repeat the frame to the
Point out the major advantages of Ring Topology. The benefits of ring topologies are: a. They are very simple to troubleshoot because every device incorporates a repeater.
explain history of internet?
You have been tasked with the job of designing the new network layout for R2I's new location. R2I has a fractional T1 line that enters the premises at Site B. You can use: 1
The LAN switch copies the whole frame into its onboard buffers and then looks up the destination address in its forwarding, or switching, table and verifies the outgoing interface
Question: The input to the circuit in the figure is a square wave that is symmetrical about 0V. Sketch the output waveform.
ADVANTAGE AND DISADVANTAGE OF WIRING SCHEMES: Each of three wiring procedure has disadvantages and advantages, which are illustrate as follows: RELIABILITY ISSUES: W
Q. Define V - 32 modem? - ITU-T's V.32 standard was issued in 1989 for asynchronous and full-duplex operation at 9600 bps. - Even though designed for asynchronous DTEs two
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