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EC-Council Certified Network Defender CND問題集を今すぐダウンロード

質問 48
Which of the following types of cyberstalking damages the reputation of their victim and turns other people against them by setting up their own Websites, blogs, or user pages for this purpose?

  • A. Encouraging others to harass the victim
  • B. Attempts to gather information about the victim
  • C. False victimization
  • D. False accusation

正解: D

解説:
In false accusations, many cyberstalkers try to damage the reputation of their victim and turn other people against them. They post false information about them on Websites. They may set up their own Websites, blogs, or user pages for this purpose. They post allegations about the victim to newsgroups, chat rooms, or other sites that allow public contributions. Answer option D is incorrect. In false victimization, the cyberstalker claims that the victim is harassing him/her. Answer option C is incorrect. In this type of cyberstalking, many cyberstalkers try to involve third parties in the harassment. They claim that the victim has harmed the stalker in some way, or may post the victim's name and telephone number in order to encourage others to join the pursuit. Answer option B is incorrect. In an attempt to gather information, cyberstalkers may approach their victim's friends, family, and work colleagues to obtain personal information. They may advertise for information on the Internet. They often will monitor the victim's online activities and attempt to trace their IP address in an effort to gather more information about their victims.

 

質問 49
Which of the following statements are true about a wireless network?
Each correct answer represents a complete solution. Choose all that apply.

  • A. Data can be transmitted in different ways by using Cellular Networks, Mobitex, DataTAC, etc.
  • B. Data can be shared easily between wireless devices.
  • C. It provides mobility to users to access a network.
  • D. It is easy to connect.

正解: A,B,C,D

 

質問 50
Which of the following tools is an open source network intrusion prevention and detection system that operates as a network sniffer and logs activities of the network that is matched with the predefined signatures?

  • A. KisMAC
  • B. Snort
  • C. Kismet
  • D. Dsniff

正解: B

解説:
Snort is an open source network intrusion prevention and detection system that operates as a network sniffer.
It logs activities of the network that is matched with the predefined signatures. Signatures can be designed for a wide range of traffic, including Internet Protocol (IP), Transmission Control Protocol (TCP), User Datagram Protocol (UDP), and Internet Control Message Protocol (ICMP). The three main modes in which Snort can be configured are as follows:
Sniffer mode: It reads the packets of the network and displays them in a continuous stream on the console.
Packet logger mode: It logs the packets to the disk.
Network intrusion detection mode: It is the most complex and configurable configuration, allowing Snort to analyze network traffic for matches against a user-defined rule set.
Answer option A is incorrect. Dsniff is a set of tools that are used for sniffing passwords, e-mail, and HTTP traffic. Some of the tools of Dsniff include dsniff, arpredirect, macof, tcpkill, tcpnice, filesnarf, and mailsnarf.
Dsniff is highly effective for sniffing both switched and shared networks. It uses the arpredirect and macof tools for switching across switched networks. It can also be used to capture authentication information for FTP, telnet, SMTP, HTTP, POP, NNTP, IMAP, etc.
Answer option D is incorrect. Kismet is a Linux-based 802.11 wireless network sniffer and intrusion detection system. It can work with any wireless card that supports raw monitoring (rfmon) mode. Kismet can sniff
802.11b, 802.11a, 802.11g, and 802.11n traffic. Kismet can be used for the following tasks:
To identify networks by passively collecting packets
To detect standard named networks
To detect masked networks
To collect the presence of non-beaconing networks via data traffic
Answer option B is incorrect. KisMAC is a wireless network discovery tool for Mac OS X. It has a wide range of features, similar to those of Kismet, its Linux/BSD namesake and far exceeding those of NetStumbler, its closest equivalent on Windows. The program is geared towards the network security professionals, and is not as novice-friendly as the similar applications. KisMAC will scan for networks passively on supported cards, including Apple's AirPort, AirPort Extreme, and many third-party cards. It will scan for networks actively on any card supported by Mac OS X itself.
Cracking of WEP and WPA keys, both by brute force, and exploiting flaws, such as weak scheduling and badly generated keys is supported when a card capable of monitor mode is used, and when packet reinsertion can be done with a supported card. The GPS mapping can be performed when an NMEA compatible GPS receiver is attached. Data can also be saved in pcap format and loaded into programs, such as Wireshark.

 

質問 51
Which of the following is a tool that runs on the Windows OS and analyzes iptables log messages to detect
port scans and other suspicious traffic?

  • A. Nmap
  • B. NetRanger
  • C. Hping
  • D. PSAD

正解: D

解説:
PSAD is a tool that runs on the Windows OS and analyzes iptables log messages to detect port scans and
other suspicious traffic. It includes many signatures from the IDS to detect probes for various backdoor
programs such as EvilFTP, GirlFriend, SubSeven, DDoS tools (mstream, shaft), and advanced port scans
(FIN, NULL, XMAS). If it is combined with fwsnort and the Netfilter string match extension, it detects most of
the attacks described in the Snort rule set that involve application layer data.
Answer option C is incorrect. NetRanger is the complete network configuration and information toolkit that
includes the following tools: Ping tool, Trace Route tool, Host Lookup tool, Internet time synchronizer, Whois
tool, Finger Unix hosts tool, Host and port scanning tool, check multiple POP3 mail accounts tool, manage
dialup connections tool, Quote of the day tool, and monitor Network Settings tool. These tools are integrated in
order to use an application interface with full online help. NetRanger is designed for both new and experienced
users. This tool is used to help diagnose network problems and to get information about users, hosts, and
networks on the Internet or on a user computer network. NetRanger uses multi-threaded and multi-connection
technologies in order to be very fast and efficient.
Answer option D is incorrect. Nmap is a free open-source utility for network exploration and security auditing. It
is used to discover computers and services on a computer network, thus creating a "map" of the network. Just
like many simple port scanners, Nmap is capable of discovering passive services. In addition, Nmap may be
able to determine various details about the remote computers. These include operating system, device type,
uptime, software product used to run a service, exact version number of that product, presence of some
firewall techniques and, on a local area network, even vendor of the remote network card. Nmap runs on Linux,
Microsoft Windows, etc.

 

質問 52
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