Which of the following statements about buffer overflow is true?

• A.It is a condition in which an application receives more data than it is configured to accept.
• B.It manages security credentials and public keys for message encryption.
• C.It is a collection of files used by Microsoft for software updates released between major service pack releases.
• D.It is a false warning about a virus.

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Which of the following statements are true about tcp wrappers?
Each correct answer represents a complete solution. Choose all that apply.

• A.tcp wrapper provides access control, host address spoofing, client username lookups, etc.
• B.When a user uses a TCP wrapper, the inetd daemon runs the wrapper program tcpd instead of running the server program directly.
• C.tcp wrapper allows host or subnetwork IP addresses, names and/or ident query replies, to be used as tokens to filter for access control purposes.
• D.tcp wrapper protects a Linux server from IP address spoofing.

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John works as a Professional Ethical Hacker for NetPerfect Inc. The company has a Linux-based network. All client computers are running on Red Hat 7.0 Linux. The Sales Manager of the company complains to John that his system contains an unknown package named as tar.gz and his documents are exploited. To resolve the problem, John uses a Port scanner to enquire about the open ports and finds out that the HTTP server service port on 27374 is open. He suspects that the other computers on the network are also facing the same problem. John discovers that a malicious application is using the synscan tool to randomly generate IP addresses.
Which of the following worms has attacked the computer?

• A.Ramen
• B.Code red
• C.Nimda
• D.LoveLetter

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Which of the following statements about a Trojan horse are true?
Each correct answer represents a complete solution. Choose two.

• A.It is a malicious software program code that resembles another normal program.
• B.It is a macro or script that attaches itself to a file or template.
• C.The writers of a Trojan horse can use it later to gain unauthorized access to a computer.
• D.It infects the boot record on hard disks and floppy disks.

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You are the Administrator for a corporate network. You are concerned about denial of service attacks.
Which of the following measures would be most helpful in defending against a Denial-of-Service (DoS) attack?

• A.Implement a strong password policy.
• B.Place a honey pot in the DMZ.
• C.Implement network based antivirus.
• D.Shorten the timeout for connection attempts.

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