CompTIA CompTIA Security+ RC0-501 Questions & Answers

• Question 271:

  An attack that is using interference as its main attack to impede network traffic is which of the following?

  A. Introducing too much data to a targets memory allocation

  B. Utilizing a previously unknown security flaw against the target

  C. Using a similar wireless configuration of a nearby network

  D. Inundating a target system with SYN requests

  Correct Answer: C

• Question 272:

  A security analyst is reviewing the following packet capture of an attack directed at a company's server located in the DMZ:

  

  Which of the following ACLs provides the BEST protection against the above attack and any further attacks from the same IP, while minimizing service interruption?

  A. DENY TCO From ANY to 172.31.64.4

  B. Deny UDP from 192.168.1.0/24 to 172.31.67.0/24

  C. Deny IP from 192.168.1.10/32 to 0.0.0.0/0

  D. Deny TCP from 192.168.1.10 to 172.31.67.4

  Correct Answer: C

• Question 273:

  Many employees are receiving email messages similar to the one shown below:

  From IT department To employee Subject email quota exceeded

  Pease click on the following link http:www.website.info/email.php?quota=1Gb and provide your username and password to increase your email quota. Upon reviewing other similar emails, the security administrator realized that all the phishing URLs have the following common elements; they all use HTTP, they all come from .info domains, and they all contain the same URI.

  Which of the following should the security administrator configure on the corporate content filter to prevent users from accessing the phishing URL, while at the same time minimizing false positives?

  A. BLOCK http://www.*.info/"

  B. DROP http://"website.info/email.php?*

  C. Redirect http://www,*. Info/email.php?quota=*TOhttp://company.com/corporate_polict.html

  D. DENY http://*.info/email.php?quota=1Gb

  Correct Answer: D

• Question 274:

  An attacker captures the encrypted communication between two parties for a week, but is unable to decrypt the messages. The attacker then compromises the session key during one exchange and successfully compromises a single message. The attacker plans to use this key to decrypt previously captured and future communications, but is unable to. This is because the encryption scheme in use adheres to:

  A. Asymmetric encryption

  B. Out-of-band key exchange

  C. Perfect forward secrecy

  D. Secure key escrow

  Correct Answer: C

• Question 275:

  A security administrator is tasked with implementing centralized management of all network devices. Network administrators will be required to logon to network devices using their LDAP credentials. All command executed by network administrators on network devices must fall within a preset list of authorized commands and must be logged to a central facility. Which of the following configuration commands should be implemented to enforce this requirement?

  A. LDAP server 10.55.199.3

  B. CN=company, CN=com, OU=netadmin, DC=192.32.10.233

  C. SYSLOG SERVER 172.16.23.50

  D. TACAS server 192.168.1.100

  Correct Answer: B

• Question 276:

  A website administrator has received an alert from an application designed to check the integrity of the company's website. The alert indicated that the hash value for a particular MPEG file has changed. Upon further investigation, the media appears to be the same as it was before the alert. Which of the following methods has MOST likely been used?

  A. Cryptography

  B. Time of check/time of use

  C. Man in the middle

  D. Covert timing

  E. Steganography

  Correct Answer: E

• Question 277:

  A security administrator determined that users within the company are installing unapproved software. Company policy dictates that only certain applications may be installed or ran on the user's computers without exception. Which of the following should the administrator do to prevent all unapproved software from running on the user's computer?

  A. Deploy antivirus software and configure it to detect and remove pirated software

  B. Configure the firewall to prevent the downloading of executable files

  C. Create an application whitelist and use OS controls to enforce it

  D. Prevent users from running as administrator so they cannot install software.

  Correct Answer: C

• Question 278:

  While reviewing the security controls in place for a web-based application, a security controls assessor notices that there are no password strength requirements in place. Because of this vulnerability, passwords might be easily discovered using a brute force attack. Which of the following password requirements will MOST effectively improve the security posture of the application against these attacks? (Select two)

  A. Minimum complexity

  B. Maximum age limit

  C. Maximum length

  D. Minimum length

  E. Minimum age limit

  F. Minimum re-use limit

  Correct Answer: AD

• Question 279:

  An organization is trying to decide which type of access control is most appropriate for the network. The current access control approach is too complex and requires significant overhead. Management would like to simplify the access control and provide user with the ability to determine what permissions should be applied to files, document, and directories. The access control method that BEST satisfies these objectives is:

  A. Rule-based access control

  B. Role-based access control

  C. Mandatory access control

  D. Discretionary access control

  Correct Answer: D

• Question 280:

  A consultant has been tasked to assess a client's network. The client reports frequent network outages. Upon viewing the spanning tree configuration, the consultant notices that an old and law performing edge switch on the network has

  been elected to be the root bridge.

  Which of the following explains this scenario?

  A. The switch also serves as the DHCP server

  B. The switch has the lowest MAC address

  C. The switch has spanning tree loop protection enabled

  D. The switch has the fastest uplink port

  Correct Answer: C