- (Topic 3)
John works as a professional Ethical Hacker. He has been assigned the project of testing the security of www.we-are-secure.com. He is using a tool to crack the wireless encryption keys. The description of the tool is as follows: Which of the following tools is John using to crack the wireless encryption keys?

Correct Answer:D

AirSnort is a Linux-based WLAN WEP cracking tool that recovers encryption keys. AirSnort operates by passively monitoring transmissions. It uses Ciphertext Only Attack and captures approximately 5 to 10 million packets to decrypt the WEP keys. Answer C is incorrect. Kismet is an IEEE 802.11 wireless network sniffer and intrusion detection system.

- (Topic 2)
With reference to the given case study, one of the security goals requires to configure a secure connection between the Boston distribution center and the headquarters. You want to implement IP filter to fulfill the security requirements. How should you implement IP filters at the headquarters? (Click the Exhibit button on the toolbar to see the case study.)

Correct Answer:D

To implement IP filters at the headquarters, add source filters for the Boston distribution center for UDP port 1701 and IP protocol 50. Also, add destination filters for the headquarters for UDP port 1701 and IP protocol 50. The Windows 2000 Router service provides routing services in the LAN and WAN environments, and over the Internet, using secure virtual private network (VPN) connections. The VPN connections are based on the Point-to-Point Tunneling Protocol (PPTP) and the Layer 2 Tunneling Protocol (L2TP) L2TP is very similar to PPTP but uses UDP, and therefore can be used over asynchronous transfer mode (ATM), Frame Relay, and X.25 networks as well. When L2TP is used over IP networks, it uses a UDP port 1701 packet format for both a control channel and a data channel. L2TP can also be used with IPSec to provide a fully secured network link. Further, IP packet filtering provides an ability to restrict the traffic into and out of each interface. Packet filtering is based on filters defined by the values of source and destination IP addresses, TCP, and UDP port numbers, and IP protocol numbers. Inbound filters that are
applied to the receiving traffic allow the receiving computer to match the traffic with the IP Filter List for the source IP address. Similarly, the outbound filters that are applied to the traffic leaving a computer towards a destination trigger a security negotiation for the destination IP address. That is why, to implement the IP filtering at the headquarters, you have to add a source address for the filters at the Boston center and a destination address for the filters at the headquarters.

- (Topic 4)
Which of the following is the most secure place to host a server that will be accessed publicly through the Internet?

Correct Answer:D

A demilitarized zone (DMZ) is the most secure place to host a server that will be accessed publicly through the Internet. Demilitarized zone (DMZ) or perimeter network is a small network that lies in between the Internet and a private network. It is the boundary between the Internet and an internal network, usually a combination of firewalls and bastion hosts that are gateways between inside networks and outside networks. DMZ provides a large enterprise network or corporate network the ability to use the Internet while still maintaining its security. Answer B is incorrect. Hosting a server on the intranet for public access will not be good from a security point of view.

- (Topic 3)
You work as a Desktop Support Technician for XYZ CORP. The company uses a Windows-based network comprising 50 Windows XP Professional computers. You want to
include the Safe Mode with Command Prompt feature into the boot.ini file of a Windows XP Professional computer. Which of the following switches will you use?

Correct Answer:C

Safe-mode boot switches are used in the Windows operating systems to use the afe-mode boot feature. To use this feature the user should press F8 during boot. These modes are available in the Boot.ini file. Users can also automate the boot process using this feature. Various switches used for various modes are given below:

- (Topic 1)
Patricia joins XYZ CORP., as a Web Developer. While reviewing the company's Web site, she finds that many words including keywords are misspelled. How will this affect the Web site traffic?

Correct Answer:B

Web site traffic depends upon the number of users who are able to locate a Web site. Search engines are one of the most frequently used tools to locate Web sites. They perform searches on the basis of keywords contained in the Web pages of a Web site. Keywords are simple text strings that are associated with one or more topics of a Web page. Misspelled keywords prevent Web pages from being displayed in the search results.

- (Topic 1)
Which of the following statements about the traceroute utility are true?

Correct Answer:AB

Traceroute is a route-tracing utility that displays the path an IP packet takes to reach its destination. It uses ICMP echo packets to display the Fully Qualified Domain Name (FQDN) and the IP address of each gateway along the route to the remote host. This tool also records the time taken for a round trip for each packet at each router that can be used to find any faulty router along the path. Answer C, D are incorrect. Traceroute does not perform polymorphic shell code attacks. Attacking tools such as ADMutate areused to perform polymorphic shell code attacks.