Exam Code: 312-50 (Practice Exam Latest Test Questions VCE PDF)
Exam Name: Ethical Hacking and Countermeasures (CEHv6)
Certification Provider: EC-Council
Free Today! Guaranteed Training- Pass 312-50 Exam.
♥♥ 2021 NEW RECOMMEND ♥♥
Free VCE & PDF File for EC-Council 312-50 Real Exam (Full Version!)
★ Pass on Your First TRY ★ 100% Money Back Guarantee ★ Realistic Practice Exam Questions
Free Instant Download NEW 312-50 Exam Dumps (PDF & VCE):
Available on:
http://www.surepassexam.com/312-50-exam-dumps.html
Q71. You are conducting a port scan on a subnet that has ICMP blocked. You have discovered 23 live systems and after scanning each of them you notice that they all show port 21 in closed state.
What should be the next logical step that should be performed?
A. Connect to open ports to discover applications.
B. Perform a ping sweep to identify any additional systems that might be up.
C. Perform a SYN scan on port 21 to identify any additional systems that might be up.
D. Rescan every computer to verify the results.
Answer: C
Explanation: As ICMP is blocked you’ll have trouble determining which computers are up and running by using a ping sweep. As all the 23 computers that you had discovered earlier had port 21 closed, probably any additional, previously unknown, systems will also have port 21 closed. By running a SYN scan on port 21 over the target network you might get replies from additional systems.
Q72. SNMP is a protocol used to query hosts, servers and devices about performance or health status data. Hackers have used this protocol for a long time to gather great amount of information about remote hosts. Which of the following features makes this possible?
A. It is susceptible to sniffing
B. It uses TCP as the underlying protocol
C. It is used by ALL devices on the market
D. It uses a community string sent as clear text
Answer: AD
Explanation: SNMP uses UDP, not TCP, and even though many devices uses SNMP not ALL devices use it and it can be disabled on most of the devices that does use it. However SNMP is susceptible to sniffing and the community string (which can be said acts as a password) is sent in clear text.
Q73. When a normal TCP connection starts, a destination host receives a SYN (synchronize/start) packet from a source host and sends back a SYN/ACK (synchronize acknowledge). The destination host must then hear an ACK (acknowledge) of the SYN/ACK before the connection is established. This is referred to as the "TCP three-way handshake." While waiting for the ACK to the SYN ACK, a connection queue of finite size on the destination host keeps track of connections waiting to be completed. This queue typically empties quickly since the ACK is expected to arrive a few milliseconds after the SYN ACK. How would an attacker exploit this design by launching TCP SYN attack?
A. Attacker generates TCP SYN packets with random destination addresses towards a victim host
B. Attacker floods TCP SYN packets with random source addresses towards a victim host
C. Attacker generates TCP ACK packets with random source addresses towards a victim host
D. Attacker generates TCP RST packets with random source addresses towards a victim host
Answer: B
Q74. Attacker forges a TCP/IP packet, which causes the victim to try opening a connection with itself. This causes the system to go into an infinite loop trying to resolve this unexpected connection. Eventually, the connection times out, but during this resolution, the machine appears to hang or become very slow. The attacker sends such packets on a regular basis to slow down the system.
Unpatched Windows XP and Windows Server 2003 machines are vulnerable to these attacks. What type of Denial of Service attack is represented here?
A. SMURF Attacks
B. Targa attacks
C. LAND attacks
D. SYN Flood attacks
Answer: C
Explanation: The attack involves sending a spoofed TCP SYN packet (connection initiation) with the target host's IP address and an open port as both source and destination.The reason a LAND attack works is because it causes the machine to reply to itself continuously.
http://en.wikipedia.org/wiki/LAND
Q75. Exhibit:
Based on the following extract from the log of a compromised machine, what is the hacker really trying to steal?
A. har.txt
B. SAM file
C. wwwroot
D. Repair file
Answer: B
Explanation: He is actually trying to get the file har.txt but this file contains a copy of the SAM file.
Q76. 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
Q77. Jim was having no luck performing a penetration test on his company’s network. He was running the test from home and had downloaded every security scanner he could lay his hands on. Despite knowing the IP range of all of the systems and the exact network configuration, Jim was unable to get any useful results. Why is Jim having these problems?
A. Security scanners can’t perform vulnerability linkage
B. Security Scanners are not designed to do testing through a firewall
C. Security Scanners are only as smart as their database and can’t find unpublished vulnerabilities
D. All of the above
Answer: D
Explanation: Security scanners are designed to find vulnerabilities but not to use them, also they will only find well known vulnerabilities that and no zero day exploits. Therefore you can’t use a security scanner for penetration testing but need a more powerful program.
Q78. Bill has started to notice some slowness on his network when trying to update his company’s website while trying to access the website from the Internet. Bill asks the help desk manager if he has received any calls about slowness from the end users, but the help desk manager says that he has not. Bill receives a number of calls from customers that can’t access the company website and can’t purchase anything online. Bill logs on to a couple of this routers and notices that the logs shows network traffic is at all time high. He also notices that almost all the traffic is originating from a specific address.
Bill decides to use Geotrace to find out where the suspect IP is originates from. The Geotrace utility runs a traceroute and finds that IP is coming from Panama. Bill knows that none of his customers are in Panama so he immediately thinks that his company is under a Denial of Service attack. Now Bill needs to find out more about the originating IP Address.
What Internet registry should Bill look in to find the IP Address?
A. LACNIC
B. ARIN
C. RIPELACNIC
D. APNIC
Answer: A
Explanation: LACNIC is the Latin American and Caribbean Internet Addresses Registry that administers IP addresses, autonomous system numbers, reverse DNS, and other network resources for that region.
Q79. You generate MD5 128-bit hash on all files and folders on your computer to keep a baseline check for security reasons?
What is the length of the MD5 hash?
A. 32 bit
B. 64 byte
C. 48 char
D. 128 kb
Answer: C
Q80. Which of the following is true of the wireless Service Set ID (SSID)? (Select all that apply.)
A. Identifies the wireless network
B. Acts as a password for network access
C. Should be left at the factory default setting
D. Not broadcasting the SSID defeats NetStumbler and other wireless discovery tools
Answer: AB
