2014年9月27日星期六

Pass4Test offre une formation sur GAQM CEH-001 CLSSYB matériaux examen

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Code d'Examen: CEH-001
Nom d'Examen: GAQM (Certified Ethical Hacker (CEH))
Questions et réponses: 878 Q&As

Code d'Examen: CLSSYB
Nom d'Examen: GAQM (Certified Lean Six Sigma Yellow Belt)
Questions et réponses: 120 Q&As

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NO.1 Assuring two systems that are using IPSec to protect traffic over the internet, what type of
general attack could compromise the data?
A. Spoof Attack
B. Smurf Attack
C. Man inthe Middle Attack
D. Trojan Horse Attack
E. Back Orifice Attack
Answer: D,E

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Explanation:
To compromise the data, the attack would need to be executed before the encryption takes place at
either end of the tunnel. Trojan Horse and Back Orifice attacks both allow for potential data
manipulation on host computers. In both cases, the data would be compromised either before
encryption or after decryption, so IPsec is not preventing the attack.

NO.2 A digital signature is simply a message that is encrypted with the public key instead of the
private key.
A. true
B. false
Answer: B

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NO.3 Under what conditions does a secondary name server request a zone transfer from a primary
name server?
A. When a primary SOA is higher that a secondary SOA
B. When a secondary SOA is higher that a primary SOA
C. When a primary name server has had its service restarted
D. When a secondary name server has had its service restarted
E. When the TTL falls to zero
Answer: A

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NO.4 Which cipher encrypts the plain text digit (bit or byte) one by one?
A. Classical cipher
B. Block cipher
C. Modern cipher
D. Stream cipher
Answer: D

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NO.5 Rebecca has noted multiple entries in her logs about users attempting to connect on ports
that are either not opened or ports that are not for public usage. How can she restrict this type of
abuse by limiting access to only specific IP addresses that are trusted by using one of the built-in
Linux Operating System tools?
A. Ensure all files have at least a 755 or more restrictive permissions.
B. Configure rules using ipchains.
C. Configure and enable portsentry on his server.
D. Install an intrusion detection system on her computer such as Snort.
Answer: B

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Explanation:
ipchains is a free software based firewall for Linux. It is a rewrite of Linux's previous IPv4 firewalling
code, ipfwadm. In Linux 2.2, ipchains is required to administer the IP packet filters. ipchains was
written because the older IPv4 firewall code used in Linux
2.0 did not work with IP fragments and didn't allow for specification of protocols other than TCP ,
UDP , and ICMP .

NO.6 Keystroke logging is the action of tracking (or logging) the keys struck on a keyboard, typically
in a covert manner so that the person using the keyboard is unaware that their actions are being
monitored.
How will you defend against hardware keyloggers when using public computers and Internet Kiosks?
(Select 4 answers)
A. Alternate between typing the login credentials and typing characters somewhere else in the
focus window
B. Type a wrong password first, later type the correct password on the login page defeating the
keylogger recording
C. Type a password beginning with the last letter and then using the mouse to move the cursor for
each subsequent letter.
D. The next key typed replaces selected text portion. E.g. if the password is "secret", one could type
"s", then some dummy keys "asdfsd". Then these dummies could be selected with mouse, and next
character from the password "e" is typed, which replaces the dummies "asdfsd"
E. The next key typed replaces selected text portion. E.g. if the password is "secret", one could type
"s", then some dummy keys "asdfsd". Then these dummies could be selected with mouse, and next
character from the password "e" is typed, which replaces the dummies "asdfsd"
Answer: A,C,D,E

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NO.7 To see how some of the hosts on your network react, Winston sends out SYN packets to an IP
range. A number of IPs respond with a SYN/ACK response. Before the connection is established he
sends RST packets to those hosts to stop the session. Winston has done this to see how his intrusion
detection system will log the traffic. What type of scan is Winston attempting here?
A. Winston is attempting to find live hosts on your company's network by using an XMAS scan.
B. He is utilizing a SYN scan to find live hosts that are listening on your network.
C. This type of scan he is using is called a NULL scan.
D. He is using a half-open scan to find live hosts on your network.
Answer: D

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NO.8 You visit a website to retrieve the listing of a company's staff members. But you can not find it
on the website. You know the listing was certainly present one year before. How can you retrieve
information from the outdated website?
A. Through Google searching cached files
B. Through Archive.org
C. Download the website and crawl it
D. Visit customers' and prtners' websites
Answer: B

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Explanation:
Archive.org mirrors websites and categorizes them by date and month depending on the crawl time.
Archive.org dates back to 1996, Google is incorrect because the cache is only as recent as the latest
crawl, the cache is over-written on each subsequent crawl. Download the website is incorrect
becausethat's the same as what you see online. Visiting customer partners websites is just bogus.
The answer is then Firmly, C, archive.org

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