CompTIA CS0-003 Online Practice Questions and Exam Preparation

CompTIA CS0-003 Online Questions & Answers

• Question 101:

  A security manager has decided to form a special group of analysts who participate in both penetration testing and defending the company's network infrastructure during exercises.

  Which of the following teams should the group form in order to achieve this goal?

  A. Blue team
  B. Purple team
  C. Red team
  D. Green team
  B. Purple team

• Question 102:

  A security analyst must preserve a system hard drive that was involved in a litigation request

  Which of the following is the best method to ensure the data on the device is not modified?

  A. Generate a hash value and make a backup image.
  B. Encrypt the device to ensure confidentiality of the data.
  C. Protect the device with a complex password.
  D. Perform a memory scan dump to collect residual data.
  A. Generate a hash value and make a backup image.

  ---

  Explanation

  Generating a hash value and making a backup image is the best method to ensure the data on the device is not modified, as it creates a verifiable copy of the original data that can be used for forensic analysis. Encrypting the device, protecting it with a password, or performing a memory scan dump do not prevent the data from being altered or deleted.

  Verified References: CompTIA CySA+ CS0-002 Certification Study Guide, page 3291

• Question 103:

  After an upgrade to a new EDR, a security analyst received reports that several endpoints were not communicating with the SaaS provider to receive critical threat signatures. To comply with the incident response playbook, the security analyst was required to validate connectivity to ensure communications. The security analyst ran a command that provided the following output:

  ComputerName: comptia007

  RemotePort: 443

  InterfaceAlias: Ethernet 3

  TcpTestSucceeded: False

  Which of the following did the analyst use to ensure connectivity?

  A. nmap
  B. tnc
  C. ping
  D. tracert
  B. tnc

  ---

  Explanation

  Comprehensive Detailed Explanation:The command output shown indicates that the analyst used a TCP connection test to check if communication on port 443 (usually HTTPS) succeeded. Here's why each option was or was not suitable:

  A. nmap: While nmap can scan ports, it does not provide direct feedback on connection success or failure in the manner shown.

  B. tnc (Test-NetConnection in PowerShell): This command in PowerShell is specifically designed to test connectivity to a specified port and IP address. The output (TcpTestSucceeded: False) is characteristic of the tnc command.

  C. ping: The ping command only tests ICMP echo replies and does not indicate success or failure on specific ports.

  D. tracert: tracert traces the path packets take to reach a host but does not provide a direct indication of port availability or success.

  References:

  Microsoft PowerShell Documentation: Test-NetConnection cmdlet, which details TCP port testing. NIST SP 800-115: Technical Guide to Information Security Testing and Assessment, covering connectivity testing methods.

• Question 104:

  A security analyst found the following entry in a server log:

  

  The analyst executed netstat and received the following output:

  

  Which of the following lines in the output confirms this was successfully executed by the server?

  A. 1
  B. 2
  C. 3
  D. 4
  E. 5
  F. 6
  G. 7
  E. 5

• Question 105:

  A company is deploying new vulnerability scanning software to assess its systems. The current network is highly segmented, and the networking team wants to minimize the number of unique firewall rules.

  Which of the following scanning techniques would be most efficient to achieve the objective?

  A. Deploy agents on all systems to perform the scans
  B. Deploy a central scanner and perform non-credentialed scans
  C. Deploy a cloud-based scanner and perform a network scan
  D. Deploy a scanner sensor on every segment and perform credentialed scans
  A. Deploy agents on all systems to perform the scans

  ---

  Explanation

  USB ports are a common attack vector that can be used to deliver malware, steal data, or compromise systems. The first step to mitigate this vulnerability is to check the configurations of the company assets and disable or restrict the USB ports if possible. This will prevent unauthorized devices from being connected and reduce the attack surface. The other options are also important, but they are not the first priority in this scenario.

  References:

  CompTIA CySA+ CS0-003 Certification Study Guide, page 247 What are Attack Vectors: Definition & Vulnerabilities, section "How to secure attack vectors" Are there any attack vectors for a printer connected through USB in a Windows environment?, answer by user "schroeder"

• Question 106:

  Which of the following is a reason to take a DevSecOps approach to a software assurance program?

  A. To find and fix security vulnerabilities earlier in the development process
  B. To speed up user acceptance testing in order to deliver the code to production faster
  C. To separate continuous integration from continuous development in the SDLC
  D. To increase the number of security-related bug fixes worked on by developers
  A. To find and fix security vulnerabilities earlier in the development process

• Question 107:

  An analyst wants to detect outdated software packages on a server.

  Which of the following methodologies will achieve this objective?

  A. Data loss prevention
  B. Configuration management
  C. Common vulnerabilities and exposures
  D. Credentialed scanning
  D. Credentialed scanning

• Question 108:

  A security engineer must deploy X 509 certificates to two web servers behind a load balancer. Each web server is configured identically.

  Which of the following should be done to ensure certificate name mismatch errors do not occur?

  A. Create two certificates, each with the same fully qualified domain name, and associate each with the web servers' real IP addresses on the load balancer.
  B. Create one certificate on the load balancer and associate the site with the web servers' real IP addresses.
  C. Create two certificates, each with the same fully qualified domain name, and associate each with a corresponding web server behind the load balancer.
  D. Create one certificate and export it to each web server behind the load balancer.
  D. Create one certificate and export it to each web server behind the load balancer.

• Question 109:

  A SOC team lead wants to automate routine tasks to improve efficiency.

  Which SOC task is most suitable for automation?

  A. Conducting security assessments of IT systems
  B. Investigating security incidents and determining root causes
  C. Reviewing logs and alerts to identify security threats
  D. Generating incident reports and notifying stakeholders
  C. Reviewing logs and alerts to identify security threats

• Question 110:

  Which of the following is often used to keep the number of alerts to a manageable level when establishing a process to track and analyze violations?

  A. Log retention
  B. Log rotation
  C. Maximum log size
  D. Threshold value
  D. Threshold value

  ---

  Explanation

  A threshold value is a parameter that defines the minimum or maximum level of a metric or event that triggers an alert. For example, a threshold value can be set to alert when the number of failed login attempts exceeds 10 in an hour, or when the CPU usage drops below 20% for more than 15 minutes. By setting a threshold value, the process can filter out irrelevant or insignificant alerts and focus on the ones that indicate a potential problem or anomaly. A threshold value can help to reduce the noise and false positives in the alert system, and improve the efficiency and accuracy of the analysis