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問題 #38
What risk factors should the analyst consider when assessing the Overall Likelihood of a threat?
答案：B
解題說明：
In NIST-style risk assessment, overall likelihood is not a single guess; it is derived by considering two related likelihood components. First is the likelihood that a threat event will be initiated. This reflects how probable it is that a threat actor or source will attempt the attack or that a threat event will occur, considering factors such as adversary capability, intent, targeting, opportunity, and environmental conditions. Second is the likelihood that an initiated event will succeed, meaning the attempt results in the adverse outcome. This depends heavily on the organization's existing protections and conditions, including control strength, system exposure, vulnerabilities, misconfigurations, detection and response capability, and user behavior.
Option A matches this structure: analysts evaluate both attack initiation likelihood and initiated attack success likelihood to reach an overall view of likelihood. A high initiation likelihood with low success likelihood might occur when an organization is frequently targeted but has strong defenses. Conversely, low initiation likelihood with high success likelihood might apply to niche systems that are rarely targeted but poorly protected.
The other options are incomplete or misplaced. Risk impact is a separate dimension from likelihood, and mitigation strategy is an output of risk treatment, not an input to likelihood. Site traffic and commerce volume can influence exposure but do not define likelihood by themselves. Past experience and trends are useful evidence, but they support estimating the two likelihood components rather than replacing them.
問題 #39
What is the purpose of Digital Rights Management DRM?
答案：A
解題說明：
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.
問題 #40
Which of the following control methods is used to protect integrity?
答案：A
解題說明：
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.
問題 #41
What common mitigation tool is used for directly handling or treating cyber risks?
答案：B
解題說明：
In cybersecurity risk management, risk treatment is the set of actions used to reduce risk to an acceptable level. The most common tool used to directly treat or mitigate cyber risk is a control because controls are the specific safeguards that prevent, detect, or correct adverse events. Cybersecurity frameworks describe controls as measures implemented to reduce either the likelihood of a threat event occurring or the impact if it does occur. Controls can be technical (such as multifactor authentication, encryption, endpoint protection, network segmentation, logging and monitoring), administrative (policies, standards, training, access approvals, change management), or physical (badges, locks, facility protections). Regardless of type, controls are the direct mechanism used to mitigate identified risks.
An exit strategy is typically a vendor or outsourcing risk management concept focused on how to transition away from a provider or system; it supports resilience but is not the primary tool for directly mitigating a specific cyber risk. Standards guide consistency by defining required practices and configurations, but the standard itself is not the mitigation-controls implemented to meet the standard are. A business continuity plan supports availability and recovery after disruption, which is important, but it primarily addresses continuity and recovery rather than directly reducing the underlying cybersecurity risk in normal operations. Therefore, the best answer is the one that represents the direct implementation of safeguards: controls.
問題 #42
SSL/TLS encryption capability is provided by:
答案：A
解題說明：
SSL and its successor TLS are cryptographic protocols designed to provide secure communications over untrusted networks. The encryption capability comes from the TLS protocol suite, which defines how two endpoints negotiate security settings, authenticate, exchange keys, and protect data as it travels between them. During the TLS handshake, the endpoints agree on a cipher suite, establish shared session keys using secure key exchange methods, and then use symmetric encryption and integrity checks to protect application data against eavesdropping and tampering. Because TLS specifies these mechanisms and the sequence of steps, it is accurate to say that encryption capability is provided by protocols.
Certificates are important but they are not the encryption mechanism itself. Digital certificates primarily support authentication and trust by binding a public key to an identity and enabling verification through a trusted certificate authority chain. Certificates help prevent impersonation and man-in-the-middle attacks by allowing clients to validate the server's identity, and in mutual TLS they can validate both parties. However, certificates alone do not define how encryption is negotiated or applied; TLS does.
Passwords are unrelated to transport encryption; they are an authentication secret and do not provide session encryption for network traffic. "Controls" is too general: SSL/TLS is indeed a security control, but the question asks specifically what provides the encryption capability. That capability is implemented and standardized by the SSL/TLS protocols, which orchestrate key establishment and encrypted communication.
問題 #43
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