You have discovered that the ls, su and ps commands no longer function as expected. They do not return information in a manner similar to any other Linux system. Also, the implementation of Tripwire you have installed on this server is returning new hash values. Which of the following has most likely occurred?

A. Atrojan has attacked the system.

B. A SQL injection attack has occurred.

C. A spyware application has been installed. D. A root kit has been installed on the system.

You have been asked to encrypt a large file using a secure encryption algorithm so you can send it via email to your supervisor. Encryption speed is important. The key will not be transmitted across a network. Which form of encryption should you use?

A. Asymmetric

B. PGP

C. Hash

D. Symmetric

At the beginning of an IPsec session, which activity occurs during the Internet Key Exchange (IKE)?

A. Determining the number of security associations

B. Negotiating the authentication method

C. Determining the network identification number

D. Negotiating the version of IP to be used

A security breach has occurred in which a third party was able to obtain and misuse legitimate authentication information. After investigation, you determined that the specific cause for the breach was that end users have been placing their passwords underneath their keyboards. Which step will best help you resolve this problem?

A. Discipline specific end users as object lessons to the rest of the staff and reset passwords on all systems immediately.

B. Change all passwords on the company servers immediately and inform end users that their passwords will be changing on a regular basis.

C. Set passwords to expire at specific intervals and establish mandatory continual training sessions.

D. Inform end users that their passwords will be changing on a regular basis and require more complex passwords.

You have implemented a version of the Kerberos protocol for your network. What service does Kerberos primarily offer?

A. Authentication

B. Encryption

C. Non-repudiation

D. Data integrity

The most popular types of proxy-oriented firewalls operate at which layer of the OSI/RM?

A. Application layer B. Network layer

C. Session layer

D. Transport layer

The best way to thwart a dictionary attack is by enforcing a:

A. strong password policy.

B. restricted access policy.

C. firewall configuration policy.

D. proxy server policy.

Which algorithm can use a 128-bit key, and has been adopted as a standard by various governments and corporations?

A. MARS

B. RC2

C. Advanced Encryption Standard (AES)

D. International Data Encryption Algorithm (IDEA)

You have determined that an attack is currently underway on your database server. An attacker is currently logged in, modifying data. You want to preserve logs, caching and other data on this affected server.

Which of the following actions will best allow you to stop the attack and still preserve data?

A. Pull the server network cable

B. Shut down the server

C. Back up the system logs

D. Force an instant password reset

What is the primary strength of symmetric-key encryption?

A. It allows easy and secure exchange of the secret key.

B. It creates aash?of a text, enabling data integrity.It creates a ?ash?of a text, enabling data integrity.

C. It can encrypt large amounts of data very quickly.

D. It provides non-repudiation services more efficiently than asymmetric-key encryption.