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Q241. Steven is the senior network administrator for Onkton Incorporated, an oil well drilling company in Oklahoma City. Steven and his team of IT technicians are in charge of keeping inventory for the entire company; including computers, software, and oil well equipment. To keep track of everything, Steven has decided to use RFID tags on their entire inventory so they can be scanned with either a wireless scanner or a handheld scanner. These RFID tags hold as much information as possible about the equipment they are attached to. When Steven purchased these tags, he made sure they were as state of the art as possible. One feature he really liked was the ability to disable RFID tags if necessary. This comes in very handy when the company actually sells oil drilling equipment to other companies. All Steven has to do is disable the RFID tag on the sold equipment and it cannot give up any information that was previously stored on it.
What technology allows Steven to disable the RFID tags once they are no longer needed?
A. Newer RFID tags can be disabled by using Terminator Switches built into the chips
B. RFID Kill Switches built into the chips enable Steven to disable them
C. The company's RFID tags can be disabled by Steven using Replaceable ROM technology
D. The technology used to disable an RFIP chip after it is no longer needed, or possibly stolen, is called RSA Blocking
Answer: D
Explanation: http://www.rsa.com/rsalabs/node.asp?id=2060
Q242. A Buffer Overflow attack involves:
A. Using a trojan program to direct data traffic to the target host's memory stack
B. Flooding the target network buffers with data traffic to reduce the bandwidth available to legitimate users
C. Using a dictionary to crack password buffers by guessing user names and passwords
D. Poorly written software that allows an attacker to execute arbitrary code on a target system
Answer: D
Explanation: B is a denial of service. By flooding the data buffer in an application with trash you could get access to write in the code segment in the application and that way insert your own code.
Q243. How would you prevent session hijacking attacks?
A. Using biometrics access tokens secures sessions against hijacking
B. Using non-Internet protocols like http secures sessions against hijacking
C. Using hardware-based authentication secures sessions against hijacking
D. Using unpredictable sequence numbers secures sessions against hijacking
Answer: D
Explanation: Protection of a session needs to focus on the unique session identifier because it is the only thing that distinguishes users. If the session ID is compromised, attackers can impersonate other users on the system. The first thing is to ensure that the sequence of identification numbers issued by the session management system is unpredictable; otherwise, it's trivial to hijack another user's session. Having a large number of possible session IDs (meaning that they should be very long) means that there are a lot more permutations for an attacker to try.
Q244. This tool is widely used for ARP Poisoning attack. Name the tool.
A. Cain and Able
B. Beat Infector
C. Poison Ivy
D. Webarp Infector
Answer: A
Q245. What did the following commands determine?
C : user2sid earth guest S-1-5-21-343818398-789336058-1343024091-501
C:sid2user 5 21 343818398 789336058 1343024091 500 Name is Joe Domain is EARTH
A. That the Joe account has a SID of 500
B. These commands demonstrate that the guest account has NOT been disabled
C. These commands demonstrate that the guest account has been disabled
D. That the true administrator is Joe
E. Issued alone, these commands prove nothing
Answer: D
Explanation: One important goal of enumeration is to determine who the true administrator is. In the example above, the true administrator is Joe.
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Q246. A denial of Service (DoS) attack works on the following principle:
A. MS-DOS and PC-DOS operating system utilize a weaknesses that can be compromised and permit them to launch an attack easily.
B. All CLIENT systems have TCP/IP stack implementation weakness that can be compromised and permit them to lunch an attack easily.
C. Overloaded buffer systems can easily address error conditions and respond appropriately.
D. Host systems cannot respond to real traffic, if they have an overwhelming number of incomplete connections (SYN/RCVD State).
E. A server stops accepting connections from certain networks one those network become flooded.
Answer: D
Explanation: Denial-of-service (often abbreviated as DoS) is a class of attacks in which an attacker attempts to prevent legitimate users from accessing an Internet service, such as a web site. This can be done by exercising a software bug that causes the software running the service to fail (such as the “Ping of Death” attack against Windows NT systems), sending enough data to consume all available network bandwidth (as in the May, 2001 attacks against Gibson Research), or sending data in such a way as to consume a particular resource needed by the service.
Q247. John is using a special tool on his Linux platform that has a signature database and is therefore able to detect hundred of vulnerabilities in UNIX, Windows, and commonly-used web CGI scripts. Additionally, the database detects DDoS zombies and Trojans. What would be the name of this multifunctional tool?
A. nmap
B. hping
C. nessus
D. make
Answer: C
Explanation: Nessus is the world's most popular vulnerability scanner, estimated to be used by over 75,000 organizations world-wide. Nmap is mostly used for scanning, not for detecting vulnerabilities. Hping is a free packet generator and analyzer for the TCP/IP protocol and make is used to automatically build large applications on the *nix plattform.
Q248. How does a denial-of-service attack work?
A. A hacker tries to decipher a password by using a system, which subsequently crashes the network
B. A hacker attempts to imitate a legitimate user by confusing a computer or even another person
C. A hacker prevents a legitimate user (or group of users) from accessing a service
D. A hacker uses every character, word, or letter he or she can think of to defeat authentication
Answer: C
Explanation: In computer security, a denial-of-service attack (DoS attack) is an attempt to make a computer resource unavailable to its intended users. Typically the targets are high-profile web servers, and the attack attempts to make the hosted web pages unavailable on the Internet. It is a computer crime that violates the Internet proper use policy as indicated by the Internet Architecture Board (IAB).
Q249. You may be able to identify the IP addresses and machine names for the firewall, and the names of internal mail servers by:
A. Sending a mail message to a valid address on the target network, and examining the header information generated by the IMAP servers
B. Examining the SMTP header information generated by using the –mx command parameter of DIG
C. Examining the SMTP header information generated in response to an e-mail message sent to an invalid address
D. Sending a mail message to an invalid address on the target network, and examining the header information generated by the POP servers
Answer: C
Q250. Which of the following is NOT true of cryptography?
A. Science of protecting information by encoding it into an unreadable format
B. Method of storing and transmitting data in a form that only those it is intended for can read and process
C. Most (if not all) algorithms can be broken by both technical and non-technical means
D. An effective way of protecting sensitive information in storage but not in transit
Answer: D
Explanation: Cryptography will protect data in both storage and in transit.