2026年ShikenPASSの最新IIBA-CCA PDFダンプおよびIIBA-CCA試験エンジンの無料共有：https://drive.google.com/open?id=1cmxc0DcqJmd0T48QJ8bgNHPgESRESFoM
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あらゆる種類の試験を扱う場合、最も重要なことは、効果的にレビューするための科学的な方法を見つけることです。最も専門的な専門家によって編集された当社のIIBA-CCA練習資料。現在まで、世界中の何万人ものお客様がIIBA-CCA試験トレントをサポートしています。 IIBA-CCA学習教材に不慣れな場合は、参考のために無料のデモをダウンロードしてください。一部の未学習の試験の受験者は、IIBA-CCA練習教材で必需品をすばやく習得できます。したがって、教材は欠かすことのできない要素教材です。
質問 # 52
Recovery Point Objectives and Recovery Time Objectives are based on what system attribute?
正解：D
解説：
Recovery Time Objective (RTO) and Recovery Point Objective (RPO) are continuity and resilience targets that define how quickly a system must be restored and how much data loss is acceptable after an interruption. These objectives are derived primarily from system criticality, meaning how essential the system is to business operations, safety, revenue, legal obligations, and customer commitments. Highly critical systems support mission-essential functions or time-sensitive services, so they require shorter RTOs (restore fast) and smaller RPOs (lose little or no data). Less critical systems can tolerate longer outages and larger data gaps, allowing longer RTOs and RPOs.
Cybersecurity and business continuity documents tie RTO/RPO determination to business impact analysis results. The BIA identifies maximum tolerable downtime, operational dependencies, and the consequences of service disruption and data unavailability. From there, organizations set RTO/RPO targets that align with risk appetite and required service levels. Those targets then drive technical and operational controls such as backup frequency, replication methods, high availability architecture, failover design, disaster recovery procedures, monitoring, and routine recovery testing.
Sensitivity focuses on confidentiality needs and may influence encryption and access controls, but it does not directly define acceptable downtime or data loss. Vulnerability describes weakness exposure and is used for threat/risk management, not recovery objectives. Cost is a constraint when selecting recovery solutions, but RTO/RPO are defined by business need and system importance first-then solutions are chosen to meet those targets within budget.
質問 # 53
What does non-repudiation mean in the context of web security?
正解：C
解説：
Non-repudiation is a security property that provides verifiable evidence of an action or communication so that the parties involved cannot credibly deny their participation later. In web security, it most commonly means being able to prove who sent a message or performed a transaction and, in many cases, that the message was received and recorded. This is why option D is correct: it captures the idea of giving the receiver proof of the sender's identity and giving the sender evidence that the message or transaction was delivered or accepted.
Cybersecurity guidance typically associates non-repudiation with digital signatures, strong identity binding, and protected audit evidence. A digital signature uses asymmetric cryptography so that only the holder of a private key can sign, while anyone with the public key can verify the signature. When combined with trusted certificates, accurate time sources, and protected logs, this creates strong accountability. Non-repudiation also depends on maintaining the integrity of supporting evidence, such as tamper-resistant audit logs, secure log retention, and controlled access to signing keys.
It is different from confidentiality (encryption of traffic), and different from integrity alone (preventing unauthorized modification). It is also different from authorization and auditing, which support accountability but do not, by themselves, provide cryptographic-grade proof that a specific entity performed a specific action. Non-repudiation is especially important for high-trust transactions such as approvals, payments, and legally binding communications.
質問 # 54
Separation of duties, as a security principle, is intended to:
正解：A
解説：
Separation of duties is a foundational access-control and governance principle designed to reduce the likelihood of misuse, fraud, and significant mistakes by ensuring that no single individual can complete a critical process end-to-end without independent oversight. Cybersecurity and audit frameworks describe this as splitting high-risk activities into distinct roles so that one person's actions are checked or complemented by another person's authority. This limits both intentional abuse, such as unauthorized payments or data manipulation, and unintentional errors, such as misconfigurations or accidental deletion of important records.
In practice, separation of duties is implemented by defining roles and permissions so that incompatible functions are not assigned to the same account. Common examples include separating the ability to create a vendor from the ability to approve payments, separating software development from production deployment, and separating system administration from security monitoring or audit log management. This is reinforced through role-based access control, approval workflows, privileged access management, and periodic access reviews that detect conflicting entitlements and privilege creep.
The value of separation of duties is risk reduction through accountability and control. When actions require multiple parties or independent review, it becomes harder for a single compromised account or malicious insider to cause large harm without detection. It also improves reliability by introducing checkpoints that catch mistakes earlier. Therefore, the correct purpose is to prevent fraud and error.
質問 # 55
The process by which organizations assess the data they hold and the level of protection it should be given based on its risk to loss or harm from disclosure, is known as:
正解：D
解説：
Information classification is the formal process of evaluating the data an organization creates or holds and assigning it a sensitivity level so the organization can apply the right safeguards. Cybersecurity policies describe classification as the foundation for consistent protection because it links the potential harm from unauthorized disclosure, alteration, or loss to specific handling and control requirements. Typical classification labels include Public, Internal, Confidential, and Restricted, though names vary by organization. Once data is classified, required protections can be specified, such as encryption at rest and in transit, access restrictions based on least privilege, approved storage locations, monitoring requirements, retention periods, and secure disposal methods.
This is not a vulnerability assessment, which focuses on identifying weaknesses in systems, applications, or configurations. It is also not an internal audit, which evaluates whether controls and processes are being followed and are effective. Option D, information categorization, is often used in some frameworks to describe assigning impact levels (for example, confidentiality, integrity, availability impact) to information types or systems, mainly to drive control baselines. While related, the question specifically emphasizes assessing data and deciding the level of protection based on risk from disclosure, which aligns most directly with classification programs used to govern labeling and handling rules across the organization.
A strong classification program improves security consistency, supports compliance, reduces accidental exposure, and helps prioritize controls for the most sensitive information assets.
質問 # 56
In the OSI model for network communication, the Session Layer is responsible for:
正解：A
解説：
The OSI Session Layer (Layer 5) is responsible for establishing, managing, and terminating sessions between communicating applications. A session is the logical dialogue that allows two endpoints to coordinate how communication starts, how it continues, and how it ends. This includes controlling the "conversation" state, such as who can transmit at what time, maintaining the session so it stays active, and closing it cleanly when it is no longer needed. Because of this, option A best matches the Session Layer's core responsibilities.
In contrast, presenting data to the receiver in a recognizable form is the job of the Presentation Layer (Layer 6), which deals with formatting, encoding, compression, and often cryptographic transformation concepts. Adding appropriate network addresses to packets aligns to the Network Layer (Layer 3), where logical addressing and routing decisions occur, typically associated with IP addressing. Transmitting the data on the medium is handled at the Physical Layer (Layer 1), which concerns signals, cabling, and the actual movement of bits.
From a cybersecurity perspective, session management is important because weaknesses can enable session hijacking, replay, or fixation, especially when session identifiers are predictable, not protected, or not properly invalidated. Controls commonly include strong authentication, secure session token generation, timeout and reauthentication rules, and proper session termination to reduce exposure.
質問 # 57
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