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Q121. What is the purpose of threat intelligence?

1. Provide information about potential threats
   2. Increase monitor resolution
   3. Replace all security devices
   4. Disable security monitoring

Correct Answer: 1. Provide information about potential threats

Explanation:
Threat intelligence provides security teams with information about potential, emerging, or known threats. It can include malicious IP addresses, domains, file hashes, attack techniques, threat actor behaviors, and information about campaigns. Security teams can use this information to improve detection rules, investigate alerts, block known malicious indicators, and understand the techniques attackers may use. Threat intelligence can come from internal investigations, security vendors, research organizations, and other trusted sources. Effective intelligence should be relevant to the organization’s environment and regularly updated because attackers frequently change their infrastructure and methods. Combining threat intelligence with other security data can improve detection and investigation capabilities.

Q122. What is the purpose of a SIEM platform?

1. Collect and correlate security events
   2. Replace network switches
   3. Increase computer memory
   4. Manage office documents

Correct Answer: 1. Collect and correlate security events

Explanation:
A Security Information and Event Management, or SIEM, platform collects security-related logs and events from multiple sources and provides capabilities for searching, correlation, monitoring, and analysis. Sources can include firewalls, endpoints, servers, applications, authentication systems, and cloud services. By bringing information together, a SIEM can help analysts identify relationships between individual events that may indicate a larger security incident. SIEM platforms can also generate alerts, dashboards, reports, and investigation data. Effective SIEM operations depend on accurate log collection, appropriate parsing and normalization, useful correlation rules, and proper retention. This centralized visibility helps security teams investigate suspicious activity more efficiently.

Q123. What is threat hunting?

1. Proactively searching for potential threats
   2. Automatically deleting all security logs
   3. Replacing endpoint protection
   4. Managing employee schedules

Correct Answer: 1. Proactively searching for potential threats

Explanation:
Threat hunting is a proactive security activity in which analysts search for evidence of malicious or suspicious activity that may not have triggered an existing alert. Instead of waiting for security tools to identify a threat, analysts develop hypotheses and examine available telemetry such as endpoint activity, network connections, authentication events, DNS requests, and process behavior. Threat hunting can uncover stealthy attackers, previously unknown techniques, or suspicious activity that bypassed automated detection. Successful hunting requires knowledge of attacker behavior, useful security data, analytical skills, and appropriate investigation tools. Findings from threat hunting can also be used to improve detection rules and strengthen security controls.

Q124. What is endpoint detection and response designed to provide?

1. Endpoint monitoring and investigation capabilities
   2. Internet subscription management
   3. Printer configuration
   4. Physical building access

Correct Answer: 1. Endpoint monitoring and investigation capabilities

Explanation:
Endpoint Detection and Response, commonly known as EDR, provides security teams with visibility into activity occurring on endpoints such as computers and servers. EDR solutions can collect information about processes, files, network connections, user activity, and other endpoint events. Analysts can use this information to investigate suspicious behavior and determine whether an endpoint has been compromised. Depending on the product and configuration, response capabilities may include isolating an endpoint, terminating a malicious process, or collecting additional evidence. EDR is valuable because endpoint telemetry can provide detailed information about attacker behavior. Organizations should properly configure and monitor EDR systems to obtain useful security visibility.

Q125. What is lateral movement?

1. Movement from one compromised system to another
   2. Updating a security policy
   3. Encrypting a backup
   4. Installing a printer

Correct Answer: 1. Movement from one compromised system to another

Explanation:
Lateral movement describes an attacker’s activity when moving from one compromised system or account to additional systems within an environment. After gaining an initial foothold, an attacker may attempt to discover other hosts, obtain credentials, exploit additional systems, or access higher-value resources. Common methods can involve stolen credentials, remote administration tools, vulnerable services, or legitimate network protocols. Detecting lateral movement requires visibility into authentication events, network connections, endpoint activity, and administrative behavior. Network segmentation, least privilege, multi-factor authentication, strong credential management, and monitoring of unusual administrative activity can help reduce the risk and impact of lateral movement.

Q126. What is data exfiltration?

1. Unauthorized transfer of data from an environment
   2. Encrypting a local database
   3. Installing a security update
   4. Creating a system backup

Correct Answer: 1. Unauthorized transfer of data from an environment

Explanation:
Data exfiltration occurs when sensitive or valuable information is transferred out of an environment without authorization. Attackers may attempt to steal credentials, customer information, intellectual property, financial records, or other sensitive data. Exfiltration can occur through web connections, cloud services, email, file-transfer mechanisms, or other communication channels. Security teams can monitor unusual outbound traffic, unexpected data transfers, suspicious destinations, and abnormal user behavior to identify potential exfiltration. Data loss prevention controls, network monitoring, access controls, encryption, and proper data classification can reduce risk. Detecting unauthorized data movement is an important part of protecting sensitive organizational information.

Q127. What is the principle of least privilege?

1. Give users only the access they need
   2. Give every user administrator access
   3. Disable authentication
   4. Allow unrestricted network access

Correct Answer: 1. Give users only the access they need

Explanation:
The principle of least privilege means that users, applications, and systems should receive only the permissions required to perform their legitimate tasks. Limiting unnecessary privileges reduces the potential impact of compromised accounts and helps prevent unauthorized actions. For example, a standard employee account generally should not have administrative permissions unless those permissions are specifically required. Least privilege should also apply to service accounts, applications, and automated processes. Organizations should regularly review permissions because access requirements can change over time. Implementing least privilege can reduce attack opportunities and limit lateral movement if an account or system is compromised.

Q128. What is multi-factor authentication used for?

1. Require multiple forms of authentication
   2. Remove password protection
   3. Increase network bandwidth
   4. Disable user accounts

Correct Answer: 1. Require multiple forms of authentication

Explanation:
Multi-factor authentication, or MFA, strengthens account security by requiring users to provide more than one type of authentication factor. These factors can include something the user knows, such as a password; something the user has, such as a security token or mobile device; or something the user is, such as a biometric characteristic. MFA can reduce the risk associated with stolen or compromised passwords because an attacker may still need an additional authentication factor. Organizations should deploy MFA for important accounts and services, particularly administrative and remote-access accounts. Proper implementation and monitoring can significantly improve protection against credential-based attacks.

Q129. What is phishing?

1. A social engineering technique used to deceive users
   2. A network routing protocol
   3. A backup technology
   4. A method of disk formatting

Correct Answer: 1. A social engineering technique used to deceive users

Explanation:
Phishing is a social engineering technique in which attackers attempt to deceive users into revealing information, opening malicious content, transferring money, or performing another unwanted action. Phishing messages may appear to come from trusted organizations, coworkers, financial institutions, or other legitimate sources. Attackers can use email, messaging platforms, websites, and other communication channels to deliver phishing attempts. Security awareness training, email security controls, URL filtering, attachment analysis, multi-factor authentication, and user reporting mechanisms can reduce the risk. Security teams should investigate suspicious messages and examine associated domains, links, attachments, and authentication activity when phishing is reported.

Q130. What is a false positive in security monitoring?

**1. Benign activity incorrectly identified as malicious
**2. A confirmed security incident
**3. A successful data backup
**4. A blocked administrator account

Correct Answer: 1. Benign activity incorrectly identified as malicious

Explanation:
A false positive occurs when a security detection identifies legitimate or benign activity as potentially malicious. False positives can consume analysts’ time and may cause important alerts to be overlooked when security teams must process large numbers of unnecessary notifications. Security teams can reduce false positives by tuning detection rules, adding appropriate context, adjusting thresholds, and creating carefully reviewed exceptions for legitimate activity. However, tuning should be performed carefully because overly broad exclusions could allow genuine threats to go undetected. Effective security operations balance detection sensitivity with accuracy so analysts can concentrate on alerts that represent meaningful risk.

Q131. What is a false negative in security monitoring?

1. Malicious activity that is not detected
   2. A legitimate activity that generates an alert
   3. A successful security scan
   4. A completed incident report

Correct Answer: 1. Malicious activity that is not detected

Explanation:
A false negative occurs when malicious activity takes place but a security control or detection mechanism fails to identify it. False negatives can be particularly dangerous because security teams may remain unaware that an attack is occurring. They can result from incomplete telemetry, outdated detection rules, new attack techniques, insufficient monitoring, or attackers deliberately attempting to evade security controls. Organizations can reduce false negatives by combining multiple detection methods, updating threat intelligence, performing threat hunting, reviewing security coverage, and continuously testing controls. Security teams should also examine incidents after discovery to determine why earlier detection mechanisms did not identify the activity.

Q132. What is network segmentation used for?

1. Separate networks to limit security exposure
   2. Increase monitor brightness
   3. Remove authentication requirements
   4. Disable firewall policies

Correct Answer: 1. Separate networks to limit security exposure

Explanation:
Network segmentation divides a larger network into separate security zones or segments. The goal is to control communication between different areas and limit the ability of an attacker to move freely through an environment. For example, sensitive servers, user systems, guest devices, and critical infrastructure can be placed into separate segments with appropriate access controls. Segmentation can reduce the impact of a compromised endpoint by restricting unnecessary communication with other systems. It should be combined with strong authentication, access control policies, monitoring, and proper configuration. Effective segmentation helps organizations establish security boundaries and limit unauthorized access between network areas.

Q133. What is vulnerability management?

1. Identify, prioritize, and remediate security weaknesses
   2. Create employee payroll records
   3. Replace all network cables
   4. Disable system updates

Correct Answer: 1. Identify, prioritize, and remediate security weaknesses

Explanation:
Vulnerability management is the ongoing process of identifying, evaluating, prioritizing, and addressing security weaknesses in systems, applications, devices, and infrastructure. Organizations may use vulnerability scanners and other assessment tools to discover outdated software, insecure configurations, and known vulnerabilities. Not every vulnerability has the same level of risk, so security teams should consider factors such as severity, exploitability, asset importance, exposure, and available compensating controls when prioritizing remediation. Regular vulnerability management helps organizations reduce their attack surface and address weaknesses before attackers exploit them. Effective programs also track remediation activities and verify that vulnerabilities have been properly resolved.

Q134. What is a security policy?

1. A documented set of security requirements and rules
   2. A type of network cable
   3. A backup storage device
   4. A software development language

Correct Answer: 1. A documented set of security requirements and rules

Explanation:
A security policy defines an organization’s expectations, requirements, and rules for protecting information systems and data. Policies can address areas such as acceptable use, password management, access control, incident response, remote access, data protection, and security responsibilities. Clear policies provide a foundation for consistent security practices and help employees understand what actions are permitted or prohibited. Policies should align with business requirements, applicable regulations, and the organization’s risk management objectives. They should also be reviewed periodically because technology, threats, business processes, and regulatory requirements can change. Security policies are most effective when supported by technical controls, procedures, training, and enforcement.

Q135. What is an incident response plan?

1. A documented approach for handling security incidents
   2. A plan for purchasing computers
   3. A method for increasing internet speed
   4. A backup storage format

Correct Answer: 1. A documented approach for handling security incidents

Explanation:
An incident response plan defines how an organization prepares for, identifies, responds to, and recovers from security incidents. It can establish roles and responsibilities, communication procedures, escalation requirements, investigation processes, containment actions, recovery steps, and documentation requirements. Having a documented plan helps security teams respond consistently during stressful situations when decisions must often be made quickly. Organizations should regularly test their incident response plans through exercises and simulations. Testing can reveal unclear responsibilities, missing information, or ineffective procedures. Lessons learned from exercises and real incidents should be used to update the plan and improve the organization’s overall incident response capability.

Q136. What is security log retention?

1. Keeping security logs for a defined period
   2. Deleting all logs immediately
   3. Blocking network traffic
   4. Encrypting every endpoint

Correct Answer: 1. Keeping security logs for a defined period

Explanation:
Security log retention refers to maintaining security-related logs for a defined period so they remain available for investigation, monitoring, compliance, and forensic purposes. Logs can contain valuable information about authentication events, network connections, system activity, administrative actions, and security alerts. Retention requirements may depend on organizational policies, legal obligations, regulatory requirements, storage capacity, and investigative needs. Organizations should ensure that important logs are protected from unauthorized modification or deletion. Retaining logs for an appropriate period allows analysts to investigate historical events and establish timelines during security incidents. Excessive retention can increase storage requirements, while insufficient retention may remove valuable evidence.

Q137. What is a security incident?

1. An event that compromises or threatens security
   2. A routine software update
   3. A normal employee login
   4. A printer configuration change

Correct Answer: 1. An event that compromises or threatens security

Explanation:
A security incident is an event or series of events that compromises, or has the potential to compromise, the confidentiality, integrity, or availability of information systems or data. Examples can include malware infections, unauthorized access, credential compromise, data exposure, and malicious network activity. Security incidents should be evaluated according to their severity, scope, affected assets, and potential business impact. Incident response processes help organizations identify, contain, investigate, eradicate, and recover from these events. Proper documentation is also important because it helps establish a timeline, supports communication, and provides information that can be used to improve security controls after the incident.

Q138. What is security event correlation?

1. Connecting related events to identify suspicious activity
   2. Deleting unrelated files
   3. Increasing storage capacity
   4. Replacing authentication systems

Correct Answer: 1. Connecting related events to identify suspicious activity

Explanation:
Security event correlation involves examining multiple events and identifying relationships that may indicate suspicious or malicious activity. An individual event may appear harmless when viewed separately, but several related events can reveal a larger attack pattern. For example, repeated authentication failures followed by a successful login and unusual access to sensitive resources may warrant investigation. Correlation can be performed by security monitoring platforms using rules, thresholds, behavioral patterns, or other analytical methods. Effective correlation depends on accurate and timely security data. It can reduce the amount of manual analysis required and help security teams identify potentially important incidents more quickly.

Q139. What is the purpose of security monitoring?

1. Continuously observe systems for security threats
   2. Disable all security alerts
   3. Increase hardware performance
   4. Remove network segmentation

Correct Answer: 1. Continuously observe systems for security threats

Explanation:
Security monitoring continuously examines systems, networks, applications, users, and security controls for suspicious or potentially malicious activity. Monitoring provides visibility that allows security teams to detect unusual behavior, investigate alerts, identify compromised systems, and respond to incidents. Effective monitoring can use information from firewalls, endpoints, authentication systems, cloud platforms, applications, and other security sources. Organizations should establish appropriate detection rules and prioritize alerts based on risk and business impact. Monitoring should also be regularly reviewed because attackers change their techniques and environments change over time. Continuous security monitoring supports faster detection and improves an organization’s overall security awareness.

Q140. What is the main goal of security incident containment?

1. Limit the spread and impact of an incident
   2. Delete all security evidence
   3. Disable every security control
   4. Restore every system immediately

Correct Answer: 1. Limit the spread and impact of an incident

Explanation:
Incident containment focuses on limiting the scope, spread, and potential damage caused by a security incident. After identifying a threat, security teams may isolate affected endpoints, block malicious network communication, disable compromised accounts, or restrict access to affected resources. The appropriate containment action depends on the type and severity of the incident and should consider business continuity requirements. Containment is different from eradication because its immediate objective is to prevent further damage while allowing investigators to gather information and determine the appropriate remediation steps. Effective containment can significantly reduce the impact of an incident and provide security teams with additional time to investigate and recover affected systems.