CompTIA Security+ Question K-14

A retail store uses a wireless network for its employees to access inventory from anywhere in the store. Due to concerns regarding the aging wireless network, the store manager has brought in a consultant to harden the network. During the site survey, the consultant discovers that the network was using WEP encryption. Which of the following would be the BEST course of action for the consultant to recommend?

A. Replace the unidirectional antenna at the front of the store with an omni-directional antenna.
B. Change the encryption used so that the encryption protocol is CCMP-based.
C. Disable the network’s SSID and configure the router to only access store devices based on MAC addresses.
D. Increase the access point’s encryption from WEP to WPA TKIP.

Answer: B

Explanation:
CCMP is the standard encryption protocol for use with the WPA2 standard and is much more secure than the WEP protocol and TKIP protocol of WPA. CCMP provides the following security services: Data confidentiality; ensures only authorized parties can access the information Authentication; provides proof of genuineness of the user Access control in conjunction with layer management

Incorrect Options:

A: The antenna type deals with signal strength and direction. It will not have a bearing on whether technology is older.

C: This option would “cloak” the network, not harden the network.

D: WPA2, which uses CCMP as its standard encryption protocol, more secure than WPA-TKIP.

Reference: http://en.wikipedia.org/wiki/CCMP http://en.wikipedia.org/wiki/Wi-Fi_Protected_Access Stewart, James Michael, CompTIA Security+ Review Guide, Sybex, Indianapolis, 2014, pp. 61, 63

CompTIA Security+ Question J-18

A network administrator has been tasked with securing the WLAN. Which of the following cryptographic products would be used to provide the MOST secure environment for the WLAN?

A. WPA2 CCMP
B. WPA
C. WPA with MAC filtering
D. WPA2 TKIP

Answer: A

Explanation:
CCMP is the standard encryption protocol for use with the WPA2 standard and is much more secure than the WEP protocol and TKIP protocol of WPA. CCMP provides the following security services: Data confidentiality; ensures only authorized parties can access the information Authentication; provides proof of genuineness of the user Access control in conjunction with layer management

Because CCMP is a block cipher mode using a 128-bit key, it is secure against attacks to the 264 steps of operation.

CompTIA Security+ Question G-88

When Ann an employee returns to work and logs into her workstation she notices that, several desktop configuration settings have changed. Upon a review of the CCTV logs, it is determined that someone logged into Ann’s workstation. Which of the following could have prevented this from happening?

A. Password complexity policy
B. User access reviews
C. Shared account prohibition policy
D. User assigned permissions policy

Answer: A

Explanation:
The most important countermeasure against password crackers is to use long, complex passwords, which are changed regularly. Since changes were made to Ann’s desktop configuration settings while she was not at work, means that her password was compromised.

CompTIA Security+ Question G-32

Which of the following is the BEST approach to perform risk mitigation of user access control rights?

A. Conduct surveys and rank the results.
B. Perform routine user permission reviews.
C. Implement periodic vulnerability scanning.
D. Disable user accounts that have not been used within the last two weeks.

Answer: B

Explanation:
Risk mitigation is accomplished any time you take steps to reduce risk. This category includes installing antivirus software, educating users about possible threats, monitoring network traffic, adding a firewall, and so on. User permissions may be the most basic aspect of security and is best coupled with a principle of least privilege. And related to permissions is the concept of the access control list (ACL). An ACL is literally a list of who can access what resource and at what level. Thus the best risk mitigation steps insofar as access control rights are concerned, is the regular/routine review of user permissions.

CompTIA Security+ Question G-18

A company plans to expand by hiring new engineers who work in highly specialized areas. Each engineer will have very different job requirements and use unique tools and applications in their job. Which of the following is MOST appropriate to use?

A. Role-based privileges
B. Credential management
C. User assigned privileges
D. User access

Answer: A

Explanation:
In this question, we have engineers who require different tools and applications according to their specialized job function. We can therefore use the Role-Based Access Control model. Role-Based Access Control (RBAC) models approach the problem of access control based on established roles in an organization. RBAC models implement access by job function or by responsibility. Each employee has one or more roles that allow access to specific information. If a person moves from one role to another, the access for the previous role will no longer be available. Instead of thinking “Denise needs to be able to edit files,” RBAC uses the logic “Editors need to be able to edit files” and “Denise is a member of the Editors group.” This model is always good for use in an environment in which there is high employee turnover.

CompTIA Security+ Question F-17

A security analyst has been tasked with securing a guest wireless network. They recommend the company use an authentication server but are told the funds are not available to set this up.
Which of the following BEST allows the analyst to restrict user access to approved devices?

A. Antenna placement
B. Power level adjustment
C. Disable SSID broadcasting
D. MAC filtering

Answer: D

Explanation:
A MAC filter is a list of authorized wireless client interface MAC addresses that is used by a WAP to block access to all unauthorized devices.

CompTIA Security+ Question C-52

A new network administrator is setting up a new file server for the company. Which of the following would be the BEST way to manage folder security?

A. Assign users manually and perform regular user access reviews
B. Allow read only access to all folders and require users to request permission
C. Assign data owners to each folder and allow them to add individual users to each folder
D. Create security groups for each folder and assign appropriate users to each group

Answer: D

Explanation:
Creating a security group for each folder and assigning necessary users to each group would only allow users belonging to the folder’s security group access to the folder. It will make assigning folder privileges much easier, while also being more secure.

CompTIA Security+ Question C-43

Ann has recently transferred from the payroll department to engineering. While browsing file shares, Ann notices she can access the payroll status and pay rates of her new coworkers. Which of the following could prevent this scenario from occurring?

A. Credential management
B. Continuous monitoring
C. Separation of duties
D. User access reviews

Answer: D

Explanation:
In addition to assigning user access properly, it is important to review that access periodically. Access review is a process to determine whether a user’s access level is still appropriate. People’s roles within an organization can change over time. It is important to review user accounts periodically and determine if they still require the access they currently have. An example of such a scenario would be a network administrator who was responsible for the domain controller but then moved over to administer the remote access servers. The administrator’s access to the domain controller should now be terminated. This concept of access review is closely related to the concept of least privileges. It is important that users do not have “leftover” privileges from previous job roles.

CompTIA Security+ Question C-33

A system administrator is notified by a staff member that their laptop has been lost. The laptop contains the user’s digital certificate. Which of the following will help resolve the issue? (Select TWO).

A. Revoke the digital certificate
B. Mark the key as private and import it
C. Restore the certificate using a CRL
D. Issue a new digital certificate
E. Restore the certificate using a recovery agent

Answer: A,D

Explanation:
The user’s certificate must be revoked to ensure that the stolen computer cannot access resources the user has had access to. To grant the user access to the resources he must be issued a new certificate.