Engineering, 01.11.2019 04:31 robertojr24ov5pel
(8 pts.) in an attempt to improve wep’s security a proposed modification (known as wep2) uses 128 bits for the initialization vector (iv) value. in this case, estimate how many packets does it take "on average" for an attacker monitoring wireless communications to detect a pair of duplicated ivs (initialization vectors) with at least 50% probability, assuming the iv values are generated randomly when an ap (access point) and a wireless client (station) are communicating using wep2’s 128-bit ivs. (hint: recall the birthday paradox.)
Answers: 2
Engineering, 04.07.2019 18:10
If a particle moves along a path such that r : (3 sin t) m and ? : 2t rad, where t is in seconds. what is the particle's acceleration in m/s in 4 seconds? a)- 16.43 b)- 16.29 c)- 15.21 d)- 13.79
Answers: 1
Engineering, 04.07.2019 18:10
For the closed feedwater heater below, feedwater enters state 3 at a pressure of 2000 psia and temperature of 420 °f at a rate of ix10 ibhr. the feedwat extracted steam enters state 1 at a pressure of 1000 psia and enthalpy of 1500 btu/lbm. the extracted er leaves at an enthalpy of 528.7 btu/lbm steam leaves as a saturated liquid. (16) a) determine the mass flow rate of the extraction steam used to heat the feedwater (10) b) determine the terminal temperature difference of the closed feedwater heater
Answers: 3
Engineering, 04.07.2019 18:10
Draw the engineering stress-strain curve for (a) bcc; (b) fcc metals and mark important points.
Answers: 1
Engineering, 04.07.2019 18:10
Which of the following refers to refers to how well the control system responds to sudden changes in the system. a)-transient regulation b)- distributed regulation c)-constant regulation d)-steady-state regulation
Answers: 1
(8 pts.) in an attempt to improve wep’s security a proposed modification (known as wep2) uses 128 bi...
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