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  1. Home
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  3. 312-50

EC-Council 312-50 Exam (page: 30)
EC-Council Ethical Hacker Certified
Updated on: 01-Sep-2025

Viewing Page 30 of 154
312-50 PDF 765 Questions

Sara is using the nslookup command to craft queries to list all DNS information (such as Name Servers, host names, MX records, CNAME records, glue records (delegation for child Domains), zone serial number, TimeToLive (TTL) records, etc) for a Domain. What do you think Sara is trying to accomplish? Select the best answer.

  1. A zone harvesting
  2. A zone transfer
  3. A zone update
  4. A zone estimate

Answer(s): B

Explanation:

The zone transfer is the method a secondary DNS server uses to update its information from the primary DNS server. DNS servers within a domain are organized using a master-slave method where the slaves get updated DNS information from the master DNS. One should configure the master DNS server to allow zone transfers only from secondary (slave) DNS servers but this is often not implemented. By connecting to a specific DNS server and successfully issuing the ls –d domain-name > file-name you have initiated a zone transfer.



A zone file consists of which of the following Resource Records (RRs)?

  1. DNS, NS, AXFR, and MX records
  2. DNS, NS, PTR, and MX records
  3. SOA, NS, AXFR, and MX records
  4. SOA, NS, A, and MX records

Answer(s): D

Explanation:

The zone file typically contains the following records:
SOA – Start Of Authority
NS – Name Server record
MX – Mail eXchange record
A – Address record



Let's imagine three companies (A, B and C), all competing in a challenging global environment. Company A and B are working together in developing a product that will generate a major competitive advantage for them. Company A has a secure DNS server while company B has a DNS server vulnerable to spoofing. With a spoofing attack on the

DNS server of company B, company C gains access to outgoing e-mails from company B. How do you prevent DNS spoofing? (Select the Best Answer.)

  1. Install DNS logger and track vulnerable packets
  2. Disable DNS timeouts
  3. Install DNS Anti-spoofing
  4. Disable DNS Zone Transfer

Answer(s): C

Explanation:

Explantion: Implement DNS Anit-Spoofing measures to prevent DNS Cache Pollution to occur.



Which DNS resource record can indicate how long any "DNS poisoning" could last?

  1. MX
  2. SOA
  3. NS
  4. TIMEOUT

Answer(s): B

Explanation:

The SOA contains information of secondary servers, update intervals and expiration times.



Joseph was the Web site administrator for the Mason Insurance in New York, who's main Web site was located at www.masonins.com. Joseph uses his laptop computer regularly to administer the Web site. One night, Joseph received an urgent phone call from his friend, Smith. According to Smith, the main Mason Insurance web site had been vandalized! All of its normal content was removed and replaced with an attacker's message ''Hacker Message: You are dead! Freaks!''
From his office, which was directly connected to Mason Insurance's internal network, Joseph surfed to the Web site using his laptop. In his browser, the Web site looked completely intact. No changes were apparent. Joseph called a friend of his at his home to help troubleshoot the problem. The Web site appeared defaced when his friend visited using his DSL connection. So, while Smith and his friend could see the defaced page, Joseph saw the intact Mason Insurance web site. To help make sense of this problem, Joseph decided to access the Web site using his dial-up ISP. He disconnected his laptop from the corporate internal network and used his modem to dial up the same ISP used by Smith. After his modem connected, he quickly typed www.masonins.com in his browser to reveal the following web page:

H@cker Mess@ge:
Y0u @re De@d! Fre@ks!

After seeing the defaced Web site, he disconnected his dial-up line, reconnected to the internal network, and used Secure Shell (SSH) to log in directly to the Web server. He ran Tripwire against the entire Web site, and determined that every system file and all the Web content on the server were intact.
How did the attacker accomplish this hack?

  1. ARP spoofing
  2. SQL injection
  3. DNS poisoning
  4. Routing table injection

Answer(s): C

Explanation:

External calls for the Web site has been redirected to another server by a successful DNS poisoning.



Viewing Page 30 of 154



Share your comments for EC-Council 312-50 exam with other users:

Cath 10/10/2023 10:19:00 AM

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