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 4 184 0 2
Firewall B 4 166 2 5
- 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.