Which of the following steps can be taken as countermeasures against sniffer attacks?
Each correct answer represents a complete solution. Choose all that apply.

• A.Use switches instead of hubs since they switch communications, which means that information is delivered only to the predefined host.
• B.Use encrypted protocols for all communications.
• C.Reduce the range of the network to avoid attacks into wireless networks.
• D.Use tools such as StackGuard and Immunix System to avoid attacks.

Comment: *

Name: *

Email: *

Verification: *

Adam, a novice computer user, works primarily from home as a medical professional. He just bought a brand new
Dual Core Pentium computer with over 3 GB of RAM. After about two months of working on his new computer, he
notices that it is not running nearly as fast as it used to. Adam uses antivirus software, anti-spyware software, and
keeps the computer up-to-date with Microsoft patches. After another month of working on the computer, Adam finds
that his computer is even more noticeably slow. He also notices a window or two pop-up on his screen, but they
quickly disappear. He has seen these windows show up, even when he has not been on the Internet. Adam notices
that his computer only has about 10 GB of free space available. Since his hard drive is a 200 GB hard drive, Adam
thinks this is very odd.
Which of the following is the mostly likely the cause of the problem?

• A.Computer is infected with the stealth kernel level rootkit.
• B.Computer is infected with the Self-Replication Worm.
• C.Computer is infected with the Stealth Trojan Virus.
• D.Computer is infected with stealth virus.

Comment: *

Name: *

Email: *

Verification: *

Adam is a novice Web user. He chooses a 22 letters long word from the dictionary as his password.
How long will it take to crack the password by an attacker?

• A.22 hours
• B.23 days
• C.200 years
• D.5 minutes

Comment: *

Name: *

Email: *

Verification: *

Which of the following is used by attackers to obtain an authenticated connection on a network?

• A.Denial-of-Service (DoS) attack
• B.Back door
• C.Man-in-the-middle attack
• D.Replay attack

Comment: *

Name: *

Email: *

Verification: *

You are monitoring your network's behavior. You find a sudden increase in traffic on the network. It seems to come in bursts and emanate from one specific machine. You have been able to determine that a user of that machine is unaware of the activity and lacks the computer knowledge required to be responsible for a computer attack. What attack might this indicate?

• A.Ping Flood
• B.Spyware
• C.Session Hijacking
• D.Denial of Service

Comment: *

Name: *

Email: *

Verification: *