I have homework 1

PROBABILITY HOMEWORK

Type your answers into a Word file and upload it into Canvas. 4 pts.

Suppose that two different network firewall software applications are being tested by a new small business. Two firewalls were tested, A and B. Suppose that over one month of time, the below types of spyware/malware were passed through onto the network by these firewalls. Answer the following questions.

Key Loggers

Cookies

Hijackers

Trojan Horses

Firewall A

2

124

0

2

Firewall B

4

156

1

3

  • What percentage of all spyware/malware in this test was not captured by A.
  • Of the hijackers, what percentage were allowed by Firewall B.
  • If I chose a security issue at random, what is the probability that it was either a key logger or trojan horse.
  • If I chose a security issue at random, and given that it was not blocked by B, what is the probability that the issue not blocked by B was a cookie.
 
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