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Q441. John the hacker is sniffing the network to inject ARP packets. He injects broadcast frames onto the wire to conduct MiTM attack. What is the destination MAC address of a broadcast frame? 






Explanation: 0xFFFFFFFFFFFF is the destination MAC address of the broadcast frame. 

Q442. Which of the following snort rules look for FTP root login attempts? 

A. alert tcp -> any port 21 (msg:"user root";) 

B. alert tcp -> any port 21 (message:"user root";) 

C. alert ftp -> ftp (content:"user password root";) 

D. alert tcp any any -> any any 21 (content:"user root";) 

Answer: D

Explanation: The snort rule header is built by defining action (alert), protocol (tcp), from IP subnet port (any any), to IP subnet port (any any 21), Payload Detection Rule Options (content:”user root”;) 

Q443. Bank of Timbuktu was a medium-sized, regional financial institution in Timbuktu. The bank has deployed a new Internet-accessible Web application recently, using which customers could access their account balances, transfer money between accounts, pay bills and conduct online financial business using a Web browser. 

John Stevens was in charge of information security at Bank of Timbuktu. After one month in production, several customers complained about the Internet enabled banking application. Strangely, the account balances of many bank’s customers has been changed! 

However, money hadn’t been removed from the bank. Instead, money was transferred between accounts. Given this attack profile, John Stevens reviewed the Web application’s logs and found the following entries: 

Attempted login of unknown user: John Attempted login of unknown user: sysaR Attempted login of unknown user: sencat Attempted login of unknown user: pete ‘’; Attempted login of unknown user: ‘ or 1=1--Attempted login of unknown user: ‘; drop table logins--Login of user jason, sessionID= 0x75627578626F6F6B Login of user daniel, sessionID= 0x98627579539E13BE Login of user rebecca, sessionID= 0x90627579944CCB811 Login of user mike, sessionID= 0x9062757935FB5C64 Transfer Funds user jason Pay Bill user mike Logout of user mike 

What kind of attack did the Hacker attempt to carry out at the bank? (Choose the best answer) 

A. The Hacker attempted SQL Injection technique to gain access to a valid bank login ID. 

B. The Hacker attempted Session hijacking, in which the Hacker opened an account with the bank, then logged in to receive a session ID, guessed the next ID and took over Jason’s session. 

C. The Hacker attempted a brute force attack to guess login ID and password using password cracking tools. 

D. The Hacker used a random generator module to pass results to the Web server and exploited Web application CGI vulnerability. 

Answer: A

Explanation: The following part: Attempted login of unknown user: pete ‘’; Attempted login of unknown user: ‘ or 1=1--Attempted login of unknown user: ‘; drop table logins--Clearly shows a hacker trying to perform a SQL injection by bypassing the login with the statement 1=1 and then dumping the logins table. 

Q444. Bob wants to prevent attackers from sniffing his passwords on the wired network. Which of the following lists the best options? 


B. SSID, WEP, Kerberos 

C. SMB, SMTP, Smart card 

D. Kerberos, Smart card, Stanford SRP 

Answer: D

Explanation: Kerberos, Smart cards and Stanford SRP are techniques where the password never leaves the computer. 

Q445. Neil monitors his firewall rules and log files closely on a regular basis. Some of the users have complained to Neil that there are a few employees who are visiting offensive web sites during work hours, without consideration for others. Neil knows that he has an updated content filtering system and that such access should not be authorized. 

What type of technique might be used by these offenders to access the Internet without restriction? 

A. They are using UDP which is always authorized at the firewall. 

B. They are using tunneling software which allows them to communicate with protocols in a way it was not intended. 

C. They have been able to compromise the firewall, modify the rules, and give themselves proper access. 

D. They are using an older version of Internet Explorer that allows them to bypass the proxy server. 

Answer: B

Explanation: This can be accomplished by, for example, tunneling the http traffic over SSH if you have a SSH server answering to your connection, you enable dynamic forwarding in the ssh client and configure Internet Explorer to use a SOCKS Proxy for network traffic. 

Q446. What are two things that are possible when scanning UDP ports? (Choose two. 

A. A reset will be returned 

B. An ICMP message will be returned 

C. The four-way handshake will not be completed 

D. An RFC 1294 message will be returned 

E. Nothing 

Answer: BE

Explanation: Closed UDP ports can return an ICMP type 3 code 3 message. No response can mean the port is open or the packet was silently dropped. 

Q447. Jack is conducting a port scan of a target network. He knows that his target network has a web server and that a mail server is up and running. Jack has been sweeping the network but has not been able to get any responses from the remote target. Check all of the following that could be a likely cause of the lack of response? 

A. The host might be down 

B. UDP is filtered by a gateway 

C. ICMP is filtered by a gateway 

D. The TCP window Size does not match 

E. The destination network might be down 

F. The packet TTL value is too low and can’t reach the target 

Answer: ACEF

Explanation: Wrong answers is B and D as sweeping a network uses ICMP 

Q448. Which of the following ICMP message types are used for destinations unreachables? 

A. 0 

B. 3 

C. 11 

D. 13 

E. 17 

Answer: B

Explanation: Type 3 messages are used for unreachable messages. 0 is Echo Reply, 8 is Echo request, 11 is time exceeded, 13 is timestamp and 17 is subnet mask request. Learning these would be advisable for the test. 

Q449. What does the following command in netcat do? 

nc -l -u -p 55555 < /etc/passwd 

A. logs the incoming connections to /etc/passwd file 

B. loads the /etc/passwd file to the UDP port 55555 

C. grabs the /etc/passwd file when connected to UDP port 55555 

D. deletes the /etc/passwd file when connected to the UDP port 55555 

Answer: C

Explanation: -l forces netcat to listen for incoming connections. 

-u tells netcat to use UDP instead of TCP 

-p 5555 tells netcat to use port 5555 

< /etc/passwd tells netcat to grab the /etc/passwd file when connected to. 

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