312-50V9 Online Practice Questions and Answers

Which of the following BEST describes how Address Resolution Protocol (ARP) works?

A. It sends a reply packet for a specific IP, asking for the MAC address

B. It sends a reply packet to all the network elements, asking for the MAC address from a specific IP

C. It sends a request packet to all the network elements, asking for the domain name from a specific IP

D. It sends a request packet to all the network elements, asking for the MAC address from a specific IP

What is the following command used for?

net use \targetipc$ "" /u:""

A. Grabbing the etc/passwd file

B. Grabbing the SAM

C. Connecting to a Linux computer through Samba.

D. This command is used to connect as a null session

E. Enumeration of Cisco routers

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

Within the context of Computer Security, which of the following statements describes Social Engineering best?

A. Social Engineering is the act of publicly disclosing information

B. Social Engineering is the means put in place by human resource to perform time accounting

C. Social Engineering is the act of getting needed information from a person rather than breaking into a system

D. Social Engineering is a training program within sociology studies

A hacker has managed to gain access to a Linux host and stolen the password file from /etc/passwd. How can he use it?

A. The password file does not contain the passwords themselves.

B. He can open it and read the user ids and corresponding passwords.

C. The file reveals the passwords to the root user only.

D. He cannot read it because it is encrypted.

A network administrator received an administrative alert at 3:00 a.m. from the intrusion detection system. The alert was generated because a large number of packets were coming into the network over ports 20 and 21. During analysis, there were no signs of attack on the FTP servers. How should the administrator classify this situation?

A. True negatives

B. False negatives

C. True positives

D. False positives

Which of the following problems can be solved by using Wireshark?

A. Tracking version changes of source code

B. Checking creation dates on all webpages on a server

C. Resetting the administrator password on multiple systems

D. Troubleshooting communication resets between two systems

Which of the following parameters enables NMAP's operating system detection feature?

A. NMAP -sV

B. NMAP -oS

C. NMAP -sR

D. NMAP -O

For messages sent through an insecure channel, a properly implemented digital signature gives the receiver reason to believe the message was sent by the claimed sender. While using a digital signature, the message digest is encrypted with which key?

A. Sender's public key

B. Receiver's private key

C. Receiver's public key

D. Sender's private key

Which of the following algorithms provides better protection against brute force attacks by using a 160-bit message digest?

A. MD5

B. SHA-1

C. RC4

D. MD4