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| Section | Objectives |
|---|---|
| Topic 1: Security Governance | - Risk Management - Compliance |
| Topic 2: Identity and Access Management | - Authentication - Authorization |
| Topic 3: Cybersecurity Fundamentals | - Principles - Core Concepts - Terminology |
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質問 # 23
Public & Private key pairs are an example of what technology?
正解：C
解説：
Public and private key pairs are the foundation of asymmetric encryption, also called public key cryptography. In this model, each entity has two mathematically related keys: a public key that can be shared widely and a private key that must be kept secret. The keys are designed so that what one key does, only the other key can undo. This enables two core security functions used throughout cybersecurity architectures.
First, confidentiality: data encrypted with a recipient's public key can only be decrypted with the recipient's private key. This allows secure communication without having to share a secret key in advance, which is especially important on untrusted networks like the internet. Second, digital signatures: a sender can sign data with their private key, and anyone can verify the signature using the sender's public key. This provides authenticity (proof the sender possessed the private key), integrity (the data was not altered), and supports non-repudiation when combined with proper key custody and audit practices.
These mechanisms underpin widely used security controls such as TLS for secure web connections, secure email standards, code signing, and certificate-based authentication. A VPN may use public key cryptography during key exchange, but the key pair itself is specifically an encryption technology. IoT and network segregation are unrelated categories.
質問 # 24
What is the purpose of Digital Rights Management DRM?
正解：C
解説：
Digital Rights Management is a set of technical mechanisms used to enforce the permitted uses of digital content after it has been delivered to a user or device. Its primary purpose is to control how copyrighted works are accessed and used, including restricting copying, printing, screen capture, forwarding, offline use, device limits, and redistribution. DRM systems commonly apply encryption to content and then rely on a licensing and policy enforcement component that checks whether a user or device has the right to open the content and under what conditions. These conditions can include time-based access (expiry), geographic limitations, subscription status, concurrent use limits, or restrictions on modification and export.
This aligns precisely with option B because DRM is fundamentally about usage control of copyrighted digital works, such as music, movies, e-books, software, and protected media streams. In cybersecurity documentation, DRM is often discussed alongside content protection, anti-piracy measures, and license compliance. It differs from general access control and audit logging: access control determines who may enter a system or open a resource, while auditing records actions for accountability. DRM extends beyond simple access by enforcing what a legitimate user can do with the content once accessed.
Option A describes audit logging, option C describes general authorization and data access control, and option D is closer to broad information rights management goals but is less precise than the standard definition focused on controlling use and distribution of copyrighted works.
質問 # 25
What is the "impact" in the context of cybersecurity risk?
正解：C
解説：
In cybersecurity risk management, impact refers to the severity of adverse consequences if a threat event occurs and successfully affects information or systems. It is the "so what" of a risk scenario: how much damage the organization, its customers, or other stakeholders could experience when confidentiality, integrity, or availability is compromised. Impact commonly includes multiple dimensions such as operational disruption, loss of critical services, harm to customers, legal or regulatory exposure, reputational damage, and direct and indirect financial loss. Because these consequences can extend beyond money, impact is broader than just costs and also includes mission failure, safety implications, loss of competitive advantage, and degradation of trust.
Option D captures this correctly by describing impact as the magnitude of harm expected from unauthorized use of information. Option C describes likelihood, not impact, because it focuses on probability over time. Option B is only one component of impact, since financial cost is important but does not fully represent business, legal, and operational consequences. Option A is also a possible consequence but is narrower than the full impact concept. Cybersecurity risk scoring typically combines likelihood and impact to prioritize treatment, ensuring high-impact scenarios receive attention even when probabilities vary.
質問 # 26
A software product that supports threat detection, and compliance and security incident management, through the collection and analysis of security events and other data sources, is known as a:
正解：C
解説：
A security information and event management system (SIEM) is designed to centralize and analyze security-relevant data to support threat detection, compliance reporting, and incident management. SIEM platforms ingest logs and telemetry from many sources such as servers, endpoints, network devices, firewalls, intrusion detection systems, identity providers, cloud services, and business applications. They normalize and correlate these events so analysts can identify suspicious patterns that would be difficult to see in isolated logs, such as repeated failed logins followed by a successful login from an unusual location, privilege escalation, lateral movement indicators, or abnormal data access.
Cybersecurity operational guidance emphasizes SIEM value in three main areas. First, detection and alerting: correlation rules, behavioral analytics, and threat intelligence enrichment help surface high-risk activity. Second, incident response support: SIEM provides timelines, evidence preservation, triage context, and query capabilities that help responders scope and contain incidents. Third, compliance and audit readiness: centralized log retention, integrity controls, and reporting demonstrate that monitoring and control requirements are operating.
The other options do not match the definition. SaaS is a delivery model, not a specific security monitoring capability. A threat risk assessment is a process, not a software product for event collection and correlation. A CASB focuses on governing and protecting cloud application usage, whereas SIEM focuses on cross-environment event aggregation, correlation, and security operations monitoring.
質問 # 27
Analyst B has discovered multiple attempts from unauthorized users to access confidential data. This is most likely?
正解：B
解説：
Multiple attempts by unauthorized users to access confidential data most closely aligns with activity from a hacker, meaning an unauthorized actor attempting to gain access to systems or information. Cybersecurity operations commonly observe this pattern as repeated login failures, password-spraying, credential-stuffing, brute-force attempts, repeated probing of restricted endpoints, or abnormal access requests against protected repositories. While "user" is too generic and could include authorized individuals, the question explicitly states "unauthorized users," pointing to malicious or illegitimate actors. "Admin" and "IT Support" are roles typically associated with legitimate privileged access and operational troubleshooting; repeated unauthorized access attempts from those roles would be atypical and would still represent compromise or misuse rather than normal operations. Cybersecurity documentation often classifies these attempts as indicators of malicious intent and potential precursor events to a breach. Controls recommended to counter such activity include strong authentication (multi-factor authentication), account lockout and throttling policies, anomaly detection, IP reputation filtering, conditional access, least privilege, and monitoring of authentication logs for patterns across accounts and geographies. The key distinction is that repeated unauthorized attempts represent hostile behavior by an external or rogue actor, which is best described as a hacker in the provided options.
質問 # 28
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