Quizzes
Quiz 2 Q2 (Meet-in-the-middle)
(Meet-in-the-middle) Suppose instead of using triple DES, DES is being applied 6 times. Under known-plaintext attack, what would be the approximate key strength? (note: a single DES is 56 bit)
112
280
144
336
168
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Tutorial 5
Note: Task refers to process or thread, i.e. do not distinguish between process and thread.
Q1
[Race Conditions] Consider the following two tasks, A and B, to be run concurrently and use a shared variable x. Assume that:
load and store of x is atomic
x is initialized to 0
x must be loaded into a register before further computations can take place.
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Mock Midterm Paper 1
Q1.3
10 packets are continuously sent over a 1 Mbps link. Each packet is of 1,000 bits long and RTT is 10 ms. What is the throughput of the link (i.e. on average, how many bits transmitted per second)?
A. 511.856 bps
B. 511.856 Kbps
C. 500 bps
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