CAS-003 CompTIA Exam Questions and Free Practice Test

Question 61

A large hospital has implemented BYOD to allow doctors and specialists the ability to access patient medical records on their tablets. The doctors and specialists access patient records over the hospital’s guest WiFi network which is isolated from the internal network with appropriate security controls. The patient records management system can be accessed from the guest network and require two factor authentication. Using a remote desktop type interface, the doctors and specialists can interact with the hospital’s system. Cut and paste and printing functions are disabled to prevent the copying of data to BYOD devices. Which of the following are of MOST concern? (Select TWO).

A. Privacy could be compromised as patient records can be viewed in uncontrolled areas.

B. Device encryption has not been enabled and will result in a greater likelihood of data loss.

C. The guest WiFi may be explogted allowing non-authorized individuals access to confidential patient data.

D. Malware may be on BYOD devices which can extract data via key logging and screen scrapes.

E. Remote wiping of devices should be enabled to ensure any lost device is rendered inoperable.

Correct Answer:AD
Privacy could be compromised because patient records can be from a doctor’s personal device. This can then be shown to persons not authorized to view this information. Similarly, the doctor’s personal device could have malware on it.
Incorrect Answers:
B: Device encryption is a BYOD concern, but the question asks “Which of the following are of MOST concern?” Patient privacy and Malware threats would be of more concern.
C: The guest WiFi network is isolated from the internal network with appropriate security controls and the doctors and specialists can interact with the hospital’s system via a remote desktop type interface.
E: Remote wiping is a BYOD concern, but the question asks “Which of the following are of MOST concern?” Patient privacy and Malware threats would be of more concern.
References:
http://www.gwava.com/blog/top-10-byod-business-concerns

Question 62

A consulting firm was hired to conduct assessment for a company. During the first stage, a penetration tester used a tool that provided the following output:
TCP 80 open
TCP 443 open
TCP 1434 filtered
The penetration tester then used a different tool to make the following requests:
GET / script/login.php?token=45$MHT000MND876
GET / script/login.php?token=@#984DCSPQ 1DF
Which of the following tools did the penetration tester use?

A. Protocol analyzer

B. Port scanner

C. Fuzzer

D. Brute forcer

E. Log analyzer

F. HTTP interceptor

Correct Answer:C

Question 63

A database administrator is required to adhere to and implement privacy principles when executing daily tasks. A manager directs the administrator to reduce the number of unique instances of PII stored within an organization’s systems to the greatest extent possible. Which of the following principles is being demonstrated?

A. Administrator accountability

B. PII security

C. Record transparency

D. Data minimization

Correct Answer:D

Question 64

A large enterprise with thousands of users is experiencing a relatively high frequency of malicious activity from the insider threats. Much of the activity appears to involve internal reconnaissance that results in targeted attacks against privileged users and network file shares. Given this scenario, which of the following would MOST likely prevent or deter these attacks? (Choose two.)

A. Conduct role-based training for privileged users that highlights common threats against them and covers best practices to thwart attacks

B. Increase the frequency at which host operating systems are scanned for vulnerabilities, and decrease the amount of time permitted between vulnerability identification and the application of corresponding patches

C. Enforce command shell restrictions via group policies for all workstations by default to limit which native operating system tools are available for use

D. Modify the existing rules of behavior to include an explicit statement prohibiting users from enumerating user and file directories using available tools and/or accessing visible resources that do not directly pertain to their job functions

E. For all workstations, implement full-disk encryption and configure UEFI instances to require complex passwords for authentication

F. Implement application blacklisting enforced by the operating systems of all machines in the enterprise

Correct Answer:CD

Question 65

A bank is in the process of developing a new mobile application. The mobile client renders content and communicates back to the company servers via REST/JSON calls. The bank wants to ensure that the communication is stateless between the mobile application and the web services gateway.
Which of the following controls MUST be implemented to enable stateless communication?

A. Generate a one-time key as part of the device registration process.

B. Require SSL between the mobile application and the web services gateway.

C. The jsession cookie should be stored securely after authentication.

D. Authentication assertion should be stored securely on the clien

Correct Answer:D
JSON Web Tokens (JWTs) are a great mechanism for persisting authentication information in a verifiable and stateless way, but that token still needs to be stored somewhere.
Login forms are one of the most common attack vectors. We want the user to give us a username and password, so we know who they are and what they have access to. We want to remember who the user is, allowing them to use the UI without having to present those credentials a second time. And we want to do all that securely. How can JWTs help?
The traditional solution is to put a session cookie in the user’s browser. This cookie contains an identifier that references a “session” in your server, a place in your database where the server remembers who this user is.
However there are some drawbacks to session identifiers:
They’re stateful. Your server has to remember that ID, and look it up for every request. This can become a burden with large systems.
They’re opaque. They have no meaning to your client or your server. Your client doesn’t know what it’s allowed to access, and your server has to go to a database to figure out who this session is for and if they are allowed to perform the requested operation.
JWTs address all of these concerns by being a self-contained, signed, and stateless authentication assertion that can be shared amongst services with a common data format.
JWTs are self-contained strings signed with a secret key. They contain a set of claims that assert an identity and a scope of access. They can be stored in cookies, but all those rules still apply. In fact, JWTs can replace your opaque session identifier, so it’s a complete win.
How To Store JWTs In The Browser
Short Answer:: use cookies, with the HttpOnly; Secure flags. This will allow the browser to send along
the token for authentication purposes, but won’t expose it to the JavaScript environment. Incorrect Answers:
A: A one-time key does not enable stateless communication.
B: SSL between the mobile application and the web services gateway will provide a secure encrypted connection between the two. However, SSL does not enable stateless communication.
C: A cookie is stateful, not stateless as required in the question. References:
https://stormpath.com/blog/build-secure-user-interfaces-using-jwtHYPERLINK "https://stormpath.com/blog/build-secure-user-interfaces-using-jwts/"s/

Question 66

A network engineer is upgrading the network perimeter and installing a new firewall, IDS, and external edge router. The IDS is reporting elevated UDP traffic, and the internal routers are reporting high utilization. Which of the following is the BEST solution?

A. Reconfigure the firewall to block external UDP traffic.

B. Establish a security baseline on the IDS.

C. Block echo reply traffic at the firewall.

D. Modify the edge router to not forward broadcast traffi

Correct Answer:B

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