{"id":14089,"date":"2026-09-16T12:45:22","date_gmt":"2026-09-16T12:45:22","guid":{"rendered":"https:\/\/www.examlabs.com\/certification\/?p=14089"},"modified":"2026-09-16T12:45:22","modified_gmt":"2026-09-16T12:45:22","slug":"comptia-cysa-cs0-003-practice-test-questions-and-exam-dumps-part11-q201-220","status":"publish","type":"post","link":"https:\/\/www.examlabs.com\/certification\/comptia-cysa-cs0-003-practice-test-questions-and-exam-dumps-part11-q201-220\/","title":{"rendered":"CompTIA CYSA+ CS0-003 Practice Test Questions and Exam Dumps Part11 Q201-220"},"content":{"rendered":"

<\/h1>\n

View Full <\/b>CompTIA CS0-003 Exam Dumps<\/b><\/a> and Practice Test Dumps.<\/b><\/h2>\n

 <\/p>\n

Question 201<\/b><\/h3>\n

Which metric measures the average time required to contain a security incident after detection?<\/b><\/p>\n

    \n
  1. MTTD<\/span><\/li>\n
  2. MTTR<\/span><\/li>\n
  3. MTTA<\/span><\/li>\n
  4. MTTC<\/span><\/li>\n<\/ol>\n

    Correct Answer: 4<\/b><\/p>\n

    Explanation<\/b><\/p>\n

    MTTC, or Mean Time to Contain, measures how long it typically takes an organization to contain a security incident after it has been identified. A lower MTTC generally indicates that responders can quickly limit an attacker’s ability to continue affecting systems. MTTD measures detection time, while MTTA measures how quickly analysts acknowledge an alert. MTTR commonly refers to Mean Time to Repair or Recover, depending on organizational usage. Security teams track these metrics to evaluate incident response performance and identify opportunities to improve containment procedures.<\/span><\/p>\n

    Question 202<\/b><\/h3>\n

    What is the primary purpose of a YARA rule?<\/b><\/p>\n

      \n
    1. Identify files or processes based on defined patterns<\/span><\/li>\n
    2. Encrypt sensitive files<\/span><\/li>\n
    3. Assign vulnerability severity scores<\/span><\/li>\n
    4. Block network connections<\/span><\/li>\n<\/ol>\n

      Correct Answer: 1<\/b><\/p>\n

      Explanation<\/b><\/p>\n

      YARA rules are used to identify and classify malware or other suspicious files and processes based on patterns. These patterns can include strings, hexadecimal sequences, file characteristics, or logical conditions. Security analysts commonly use YARA during malware analysis and threat hunting to search systems for artifacts associated with known threats. YARA itself does not function as an encryption mechanism or vulnerability scoring system. It also does not inherently block network traffic, although its findings can be integrated with other security controls.<\/span><\/p>\n

      Question 203<\/b><\/h3>\n

      An analyst notices repeated authentication failures followed by a successful login from the same external IP address. What should the analyst investigate first?<\/b><\/p>\n

        \n
      1. DNS poisoning<\/span><\/li>\n
      2. Data exfiltration<\/span><\/li>\n
      3. Possible credential attack<\/span><\/li>\n
      4. Network segmentation failure<\/span><\/li>\n<\/ol>\n

        Correct Answer: 3<\/b><\/p>\n

        Explanation<\/b><\/p>\n

        Repeated authentication failures followed by a successful login can indicate a credential-based attack such as password guessing, brute force, or password spraying. The analyst should examine authentication logs, source IP information, targeted accounts, login times, and other related activity to determine whether the successful authentication was legitimate. Additional indicators, such as impossible travel or unusual device information, can strengthen the investigation. DNS poisoning and segmentation failures do not directly explain the authentication pattern, while data exfiltration would typically be investigated after suspicious access has been established.<\/span><\/p>\n

        Question 204<\/b><\/h3>\n

        Which security control can prevent users from executing unauthorized applications on endpoints?<\/b><\/p>\n

          \n
        1. Network firewall<\/span><\/li>\n
        2. Application allowlisting<\/span><\/li>\n
        3. Web proxy<\/span><\/li>\n
        4. DNS server<\/span><\/li>\n<\/ol>\n

          Correct Answer: 2<\/b><\/p>\n

          Explanation<\/b><\/p>\n

          Application allowlisting restricts endpoint execution to applications that have been explicitly approved. This approach can prevent unauthorized or unknown executables from running, reducing the risk of malware execution and unwanted software. Unlike a firewall, which primarily controls network traffic, allowlisting focuses on application execution. A web proxy controls or monitors web requests, while a DNS server resolves domain names. Allowlisting can be particularly useful in environments where administrators need tight control over which software is permitted to execute on corporate systems.<\/span><\/p>\n

          Question 205<\/b><\/h3>\n

          A security analyst receives thousands of alerts from a SIEM every hour, many of which are irrelevant. What should be performed first?<\/b><\/p>\n

            \n
          1. Disable the SIEM<\/span><\/li>\n
          2. Increase log retention<\/span><\/li>\n
          3. Remove all detection rules<\/span><\/li>\n
          4. Tune correlation and detection rules<\/span><\/li>\n<\/ol>\n

            Correct Answer: 4<\/b><\/p>\n

            Explanation<\/b><\/p>\n

            SIEM tuning is the appropriate response when excessive alerts create alert fatigue. Analysts should review noisy rules, identify recurring false positives, adjust thresholds, add contextual conditions, and prioritize alerts based on risk. Disabling the SIEM would remove important visibility, while deleting detection rules could create significant monitoring gaps. Increasing log retention does not directly reduce alert volume. Effective tuning improves the signal-to-noise ratio, allowing analysts to concentrate on suspicious events while preserving useful security telemetry and maintaining appropriate detection coverage.<\/span><\/p>\n

            Question 206<\/b><\/h3>\n

            Which technique is most useful for identifying suspicious changes to system files?<\/b><\/p>\n

              \n
            1. Network segmentation<\/span><\/li>\n
            2. Vulnerability scanning<\/span><\/li>\n
            3. File integrity monitoring<\/span><\/li>\n
            4. Data classification<\/span><\/li>\n<\/ol>\n

              Correct Answer: 3<\/b><\/p>\n

              Explanation<\/b><\/p>\n

              File integrity monitoring, or FIM, detects changes to important files by comparing their current state against a known baseline. It can identify modifications, deletions, or unexpected additions that may indicate malware activity, unauthorized administrative changes, or system compromise. Vulnerability scanning identifies weaknesses rather than monitoring file changes. Network segmentation separates network resources, while data classification categorizes information according to sensitivity. FIM is especially valuable for monitoring critical operating system files, configuration files, application files, and other assets where unauthorized modifications may indicate suspicious activity.<\/span><\/p>\n

              Question 207<\/b><\/h3>\n

              Which DNS record helps identify the authorized mail servers for a domain?<\/b><\/p>\n

                \n
              1. MX<\/span><\/li>\n
              2. TXT<\/span><\/li>\n
              3. PTR<\/span><\/li>\n
              4. CNAME<\/span><\/li>\n<\/ol>\n

                Correct Answer: 1<\/b><\/p>\n

                Explanation<\/b><\/p>\n

                An MX, or Mail Exchange, record identifies the mail servers responsible for receiving email for a domain. Security analysts can examine MX records when investigating email infrastructure, phishing campaigns, or suspicious domains. TXT records can contain information such as SPF policies, but they do not directly identify the domain’s mail exchange servers. PTR records provide reverse DNS information, while CNAME records create aliases for domain names. Reviewing DNS records can help analysts understand how a domain is configured and identify infrastructure potentially associated with suspicious email activity.<\/span><\/p>\n

                Question 208<\/b><\/h3>\n

                What is the main purpose of a security baseline?<\/b><\/p>\n

                  \n
                1. Identify phishing emails<\/span><\/li>\n
                2. Define an approved system configuration<\/span><\/li>\n
                3. Analyze packet captures<\/span><\/li>\n
                4. Detect data exfiltration<\/span><\/li>\n<\/ol>\n

                  Correct Answer: 2<\/b><\/p>\n

                  Explanation<\/b><\/p>\n

                  A security baseline defines the expected and approved configuration of a system, device, or application. Security teams can compare current configurations against the baseline to identify unauthorized changes, weak settings, or configuration drift. Baselines may specify password policies, enabled services, firewall settings, software versions, logging requirements, and other controls. Packet capture analysis and phishing detection address different security functions, while data exfiltration monitoring focuses on identifying unauthorized data movement. Maintaining accurate baselines supports configuration management and helps organizations consistently enforce security requirements.<\/span><\/p>\n

                  Question 209<\/b><\/h3>\n

                  Which attack involves tricking a user into approving a malicious authentication request?<\/b><\/p>\n

                    \n
                  1. SQL injection<\/span><\/li>\n
                  2. DNS tunneling<\/span><\/li>\n
                  3. MFA fatigue<\/span><\/li>\n
                  4. Buffer overflow<\/span><\/li>\n<\/ol>\n

                    Correct Answer: 3<\/b><\/p>\n

                    Explanation<\/b><\/p>\n

                    MFA fatigue attacks exploit repeated multi-factor authentication prompts. An attacker who already possesses a user’s credentials repeatedly sends authentication requests, hoping the user will eventually approve one simply to stop the notifications. Once approved, the attacker may gain access to the targeted account. Security teams can reduce this risk through number matching, phishing-resistant authentication, risk-based access policies, and user awareness. SQL injection targets applications and databases, DNS tunneling abuses DNS traffic for communication, and buffer overflows exploit memory-handling weaknesses.<\/span><\/p>\n

                    Question 210<\/b><\/h3>\n

                    What is the primary purpose of a honeynet?<\/b><\/p>\n

                      \n
                    1. Store production backups<\/span><\/li>\n
                    2. Encrypt network traffic<\/span><\/li>\n
                    3. Replace endpoint protection<\/span><\/li>\n
                    4. Attract and observe malicious activity<\/span><\/li>\n<\/ol>\n

                      Correct Answer: 4<\/b><\/p>\n

                      Explanation<\/b><\/p>\n

                      A honeynet is a collection of intentionally deployed systems designed to attract and observe potentially malicious activity. Because legitimate users generally should not interact with these systems, activity within a honeynet can provide valuable indicators about attacker behavior, tools, techniques, and infrastructure. Honeynets can support threat intelligence and threat hunting activities. They should be carefully isolated from production resources to prevent attackers from using them as a pathway into legitimate systems. A honeynet is not intended to replace endpoint security, backups, or encryption controls.<\/span><\/p>\n

                      Question 211<\/b><\/h3>\n

                      Which security practice reduces the risk of excessive permissions in an organization?<\/b><\/p>\n

                        \n
                      1. Privilege reviews<\/span><\/li>\n
                      2. Log compression<\/span><\/li>\n
                      3. Packet fragmentation<\/span><\/li>\n
                      4. DNS caching<\/span><\/li>\n<\/ol>\n

                        Correct Answer: 1<\/b><\/p>\n

                        Explanation<\/b><\/p>\n

                        Regular privilege reviews help identify accounts that have unnecessary, excessive, or outdated permissions. Security teams can compare assigned privileges with users’ current job responsibilities and remove access that is no longer required. This supports the principle of least privilege and reduces the potential impact of compromised accounts. Log compression affects storage efficiency, packet fragmentation concerns network transmission, and DNS caching improves name-resolution performance. Privilege reviews are particularly important after role changes, employee transfers, application changes, and other events that may cause access rights to accumulate over time.<\/span><\/p>\n

                        Question 212<\/b><\/h3>\n

                        Which technology provides centralized visibility into security events collected from multiple systems?<\/b><\/p>\n

                          \n
                        1. NAC<\/span><\/li>\n
                        2. SIEM<\/span><\/li>\n
                        3. WAF<\/span><\/li>\n
                        4. VPN<\/span><\/li>\n<\/ol>\n

                          Correct Answer: 2<\/b><\/p>\n

                          Explanation<\/b><\/p>\n

                          A Security Information and Event Management system, or SIEM, collects and analyzes security-related logs and events from multiple sources. These can include servers, endpoints, firewalls, applications, identity systems, and cloud services. Centralized visibility allows analysts to correlate events and identify patterns that may indicate attacks. NAC focuses on controlling network access, WAF protects web applications, and VPN provides secure remote connectivity. SIEM platforms can also support alerting, investigation, dashboards, reporting, and long-term analysis of security events.<\/span><\/p>\n

                          Question 213<\/b><\/h3>\n

                          Which vulnerability identifier is commonly used to uniquely identify publicly disclosed software vulnerabilities?<\/b><\/p>\n

                            \n
                          1. CWE<\/span><\/li>\n
                          2. CVSS<\/span><\/li>\n
                          3. IOC<\/span><\/li>\n
                          4. CVE<\/span><\/li>\n<\/ol>\n

                            Correct Answer: 4<\/b><\/p>\n

                            Explanation<\/b><\/p>\n

                            CVE, or Common Vulnerabilities and Exposures, provides standardized identifiers for publicly disclosed cybersecurity vulnerabilities. A CVE identifier allows security teams, vendors, researchers, and vulnerability management platforms to consistently reference a specific vulnerability. CVSS is used to calculate vulnerability severity, while CWE describes categories of software weaknesses. An IOC is an artifact that may indicate malicious activity, such as an IP address, domain, or file hash. Analysts often use CVE information together with CVSS scores and asset context when prioritizing remediation.<\/span><\/p>\n

                            Question 214<\/b><\/h3>\n

                            An attacker uses legitimate administrative tools such as PowerShell to execute malicious commands. What technique does this represent?<\/b><\/p>\n

                              \n
                            1. Credential stuffing<\/span><\/li>\n
                            2. SQL injection<\/span><\/li>\n
                            3. Living off the land<\/span><\/li>\n
                            4. DNS poisoning<\/span><\/li>\n<\/ol>\n

                              Correct Answer: 3<\/b><\/p>\n

                              Explanation<\/b><\/p>\n

                              Living off the land involves using legitimate tools, utilities, or capabilities already available on a compromised system to perform malicious activities. PowerShell, Windows Management Instrumentation, command shells, and other administrative utilities may be abused in this way. Because these tools are legitimate and commonly used by administrators, their activity can be harder to distinguish from normal operations. Security teams can detect this behavior by analyzing process execution, command-line arguments, parent-child process relationships, user context, and unusual activity patterns.<\/span><\/p>\n

                              Question 215<\/b><\/h3>\n

                              What should an analyst preserve before modifying digital evidence during an investigation?<\/b><\/p>\n

                                \n
                              1. User preferences<\/span><\/li>\n
                              2. A forensic copy<\/span><\/li>\n
                              3. Application licenses<\/span><\/li>\n
                              4. Network bandwidth<\/span><\/li>\n<\/ol>\n

                                Correct Answer: 2<\/b><\/p>\n

                                Explanation<\/b><\/p>\n

                                A forensic copy, often called a forensic image, preserves a bit-for-bit representation of digital evidence so investigators can analyze the copy without altering the original data. Maintaining an original evidence source helps preserve its integrity and supports reliable forensic conclusions. Investigators should also document acquisition procedures, timestamps, hashes, and evidence handling activities. User preferences, software licenses, and network bandwidth are not substitutes for evidence preservation. Proper evidence acquisition and documentation are essential when findings may need to support internal investigations, legal proceedings, or disciplinary actions.<\/span><\/p>\n

                                Question 216<\/b><\/h3>\n

                                Which email authentication mechanism allows a domain to publish a policy specifying which servers may send email on its behalf?<\/b><\/p>\n

                                  \n
                                1. SPF<\/span><\/li>\n
                                2. SSH<\/span><\/li>\n
                                3. SNMP<\/span><\/li>\n
                                4. NTP<\/span><\/li>\n<\/ol>\n

                                  Correct Answer: 1<\/b><\/p>\n

                                  Explanation<\/b><\/p>\n

                                  Sender Policy Framework, or SPF, allows a domain owner to publish a DNS record identifying authorized mail servers that may send email for that domain. Receiving mail systems can check the sender’s IP address against the published SPF policy. This helps reduce certain types of email spoofing and supports broader email security controls. SSH is used for secure remote administration, SNMP is used for network management, and NTP synchronizes system time. SPF works alongside mechanisms such as DKIM and DMARC to strengthen email authentication.<\/span><\/p>\n

                                  Question 217<\/b><\/h3>\n

                                  A vulnerability scanner reports a critical vulnerability on a server. What should the analyst do before closing the remediation ticket?<\/b><\/p>\n

                                    \n
                                  1. Delete the scan results<\/span><\/li>\n
                                  2. Disable the server<\/span><\/li>\n
                                  3. Ignore the vulnerability<\/span><\/li>\n
                                  4. Perform remediation validation<\/span><\/li>\n<\/ol>\n

                                    Correct Answer: 4<\/b><\/p>\n

                                    Explanation<\/b><\/p>\n

                                    Remediation validation confirms that a reported vulnerability has actually been corrected. After a patch, configuration change, or other remediation action, the analyst should rescan or otherwise verify the affected system to ensure the vulnerability is no longer present. Simply applying a patch does not guarantee successful remediation because the update may have failed, been applied incorrectly, or left related weaknesses unresolved. Validation provides evidence that the corrective action worked and supports accurate vulnerability management records and risk reporting.<\/span><\/p>\n

                                    Question 218<\/b><\/h3>\n

                                    Which control separates sensitive systems from less trusted network segments?<\/b><\/p>\n

                                      \n
                                    1. Load balancing<\/span><\/li>\n
                                    2. Network segmentation<\/span><\/li>\n
                                    3. Data compression<\/span><\/li>\n
                                    4. File hashing<\/span><\/li>\n<\/ol>\n

                                      Correct Answer: 2<\/b><\/p>\n

                                      Explanation<\/b><\/p>\n

                                      Network segmentation divides a network into separate logical or physical security zones. Sensitive systems can be placed in restricted segments with tightly controlled communication paths, reducing opportunities for attackers to move laterally after compromising another system. Segmentation can be implemented using VLANs, firewalls, routing policies, access controls, or software-defined networking technologies. Load balancing distributes application traffic, data compression reduces data size, and hashing creates fixed-length representations of data. Effective segmentation limits unnecessary communication between systems and can reduce the potential impact of a security incident.<\/span><\/p>\n

                                      Question 219<\/b><\/h3>\n

                                      Which activity is most closely associated with threat hunting?<\/b><\/p>\n

                                        \n
                                      1. Waiting for automated alerts<\/span><\/li>\n
                                      2. Installing routine software updates<\/span><\/li>\n
                                      3. Searching proactively for suspicious behavior<\/span><\/li>\n
                                      4. Creating employee payroll records<\/span><\/li>\n<\/ol>\n

                                        Correct Answer: 3<\/b><\/p>\n

                                        Explanation<\/b><\/p>\n

                                        Threat hunting is a proactive security activity in which analysts search for signs of compromise or malicious behavior that automated detections may have missed. Hunters commonly begin with a hypothesis based on threat intelligence, known attacker techniques, unusual behaviors, or emerging threats. They then analyze endpoint, network, identity, and other telemetry to identify supporting evidence. Threat hunting differs from simply waiting for alerts because analysts actively investigate potential threats. Findings from hunts can also improve detection rules and strengthen future monitoring capabilities.<\/span><\/p>\n

                                        Question 220<\/b><\/h3>\n

                                        Which principle requires users to receive only the access necessary to perform their assigned duties?<\/b><\/p>\n

                                          \n
                                        1. Least privilege<\/span><\/li>\n
                                        2. Defense in depth<\/span><\/li>\n
                                        3. Separation of duties<\/span><\/li>\n
                                        4. Fail secure<\/span><\/li>\n<\/ol>\n

                                          Correct Answer: 1<\/b><\/p>\n

                                          Explanation<\/b><\/p>\n

                                          The principle of least privilege requires users, applications, and services to receive only the permissions necessary to perform their authorized tasks. Limiting access reduces the potential damage caused by compromised accounts, malicious insiders, or accidental misuse. For example, a standard employee should not automatically receive administrative privileges when those permissions are unnecessary for the role. Separation of duties is a related but different principle that divides sensitive responsibilities among multiple individuals. Least privilege should be regularly reviewed because permissions can become excessive as roles and responsibilities change.<\/span><\/p>\n

                                           <\/p>\n","protected":false},"excerpt":{"rendered":"

                                          View Full CompTIA CS0-003 Exam Dumps and Practice Test Dumps.   Question 201 Which metric measures the average time required to contain a security incident after detection? MTTD MTTR MTTA MTTC Correct Answer: 4 Explanation MTTC, or Mean Time to Contain, measures how long it typically takes an organization to contain a security incident after […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[1648,1647],"tags":[],"_links":{"self":[{"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/posts\/14089"}],"collection":[{"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/comments?post=14089"}],"version-history":[{"count":1,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/posts\/14089\/revisions"}],"predecessor-version":[{"id":14148,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/posts\/14089\/revisions\/14148"}],"wp:attachment":[{"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/media?parent=14089"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/categories?post=14089"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/tags?post=14089"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}