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質問 # 46
Why is directory management important for cybersecurity?
正解：D
解説：
Directory management is important because it provides a centralized way to define identities, groups, roles, and permissions, which directly determines who can access network resources. In most enterprises, directory services store user and service accounts and then integrate with file servers, applications, email platforms, VPN, and cloud services. This integration enables consistent enforcement of authorization rules such as group-based access to shared folders and files, role-based access control, and least privilege. Option D captures this core security purpose: directory management is a foundational control mechanism for governing access to networked resources.
From a cybersecurity controls perspective, directory management supports secure onboarding and offboarding, ensuring that new users receive only appropriate permissions and that departing users are disabled promptly to reduce insider and external risk. It also strengthens authentication by enabling enterprise-wide policies such as password rules, account lockouts, multi-factor authentication integration, and conditional access. In addition, centralized directories improve auditability: administrators can review memberships and entitlements, monitor privileged group changes, and generate logs that support investigations and compliance reporting.
The other options are either too broad or not primarily about directory management. While directories help protect confidential information indirectly, their direct function is not "preventing outside agents" by itself; it is enforcing access rules. They also do not manage all application security through one interface, and preventing outsiders from knowing employee personal information is a privacy objective, not the main purpose of directory management.
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質問 # 47
Which of the following control methods is used to protect integrity?
正解：D
解説：
Integrity means information and systems remain accurate, complete, and protected from unauthorized or improper modification. The Principle of Least Privilege is a direct integrity protection control because it limits who can change data and what changes they are allowed to make. Under least privilege, users, applications, and service accounts receive only the minimum permissions needed to perform approved tasks, and nothing more. This reduces the chance that an attacker using a compromised account can alter records, manipulate transactions, or change configurations, and it also reduces accidental changes by well-meaning users who do not need write or administrative rights.
Least privilege is commonly enforced through role-based access control, separation of duties, restricted administrative roles, just-in-time elevation for privileged tasks, and periodic access reviews to remove excess permissions. These practices are emphasized in cybersecurity frameworks because integrity failures often occur when excessive access allows unauthorized edits to sensitive data, logs, security settings, or application code.
The other options relate to security but are less directly tied to integrity as the primary objective. Biometric verification is an authentication method that helps confirm identity; it supports access control broadly, but it does not by itself limit modification capability once access is granted. Anti-malicious code detection helps prevent malware that could corrupt data, but it is primarily a detection/prevention tool rather than the foundational control for authorized modification. Backups and redundancy primarily support availability and recovery after corruption, not the prevention of unauthorized changes.
質問 # 48
Which organizational resource category is known as "the first and last line of defense" from an attack?
正解：C
解説：
In cybersecurity guidance, employees are often described as the first and last line of defense because human actions influence nearly every stage of an attack. They are the first line since many threats begin with user interaction: phishing emails, malicious links, social engineering calls, unsafe file handling, weak passwords, and accidental disclosure of sensitive information. A well-trained user who recognizes suspicious requests, verifies identities, and reports anomalies can stop an incident before any technical control is even engaged.
Employees are also the last line because technical protections such as firewalls, filters, and endpoint tools are not perfect. Attackers routinely bypass or evade automated defenses using stolen credentials, living-off-the-land techniques, misconfigurations, or novel malware. When those controls fail, the organization still depends on people to apply secure behaviors: following least privilege, protecting credentials, using multifactor authentication correctly, confirming out-of-band requests for payments or data, and escalating unusual activity quickly. Incident response, containment, and recovery also depend on humans making correct decisions under pressure, following documented procedures, and communicating accurately.
Cybersecurity documents emphasize that a strong security culture, regular awareness training, role-based education, clear reporting channels, and consistent policy enforcement reduce human-enabled risk and turn employees into an effective security control rather than a vulnerability.
質問 # 49
Which capability would a solution option need to demonstrate in order to satisfy Logging Requirements?
正解：B
解説：
Logging requirements in cybersecurity focus on ensuring the system can produce reliable, actionable records that support detection, investigation, compliance, and accountability. The most fundamental capability is the ability to record information about user access and actions within the system. This includes authentication events such as logon success or failure, logoff, session creation, and privilege elevation; authorization decisions such as access granted or denied; and security-relevant actions such as viewing, creating, modifying, deleting, exporting, or transmitting sensitive data. Good security logging also captures context like timestamp synchronization, user or service identity, source device or IP, target resource, action performed, and outcome.
This capability supports multiple operational needs. Security monitoring teams rely on logs to identify anomalies like repeated failed logins, unusual access times, access from unexpected locations, or high-risk administrative changes. Incident responders need logs to reconstruct timelines, confirm scope, and preserve evidence. Auditors and compliance teams require logs to demonstrate control effectiveness, segregation of duties, and traceability of changes.
The other options are not sufficient to satisfy logging requirements. Single sign-on can simplify authentication but does not guarantee application-level activity logging. Integration with specialized tools may be useful, but the solution must first generate the required events. Deployment model options do not address whether the system can create detailed audit trails. Therefore, the required capability is recording user access and actions in the system.
質問 # 50
Which of the following activities are part of the business analyst's role in ensuring compliance with security policies?
正解：A
解説：
Business analysts support cybersecurity compliance primarily by ensuring that security and privacy expectations are translated into clear, testable requirements that are built into the solution. This includes eliciting applicable organizational security policies, standards, and control objectives, then mapping them into functional and non-functional requirements such as authentication methods, role-based access, logging and audit trail needs, encryption requirements, session controls, data retention, and segregation of duties. When security policies are reflected in the solution requirements, they become part of the delivery lifecycle: they can be designed, implemented, validated in testing, and verified during acceptance. This creates traceability from policy to requirement to control implementation, which is essential for audits and for demonstrating due diligence.
Option A is typically the responsibility of governance, risk, and compliance functions or internal audit, not the BA. Option C is usually performed by security testing specialists, QA teams, or application security engineers using techniques like SAST, DAST, and penetration testing. Option D is largely an operational management and compliance enforcement function, supported by training, monitoring, and disciplinary processes. The BA's distinct contribution is ensuring policy-driven security controls are captured in requirements and embedded into the solution design and delivery artifacts.
質問 # 51
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