CISSP Certification: Mastering Data Encryption and Security Protocols Quiz

CAST is a Feistel-based symmetric block cipher operating on 64-bit blocks, making it historically significant in cryptographic design. Feistel structures split data into halves and apply round functions iteratively, offering efficiency and reversibility. SAFER and Blowfish are symmetric but differ structurally, while Twofish uses a different design approach.

Tabletop exercises allow stakeholders to review disaster recovery plans collaboratively without disrupting operations. They are cost-effective because they do not require system shutdowns or physical drills. By simulating scenarios through discussion, overlaps, gaps, and conflicts are identified early, making them ideal before more complex recovery testing.

Reduction analysis focuses on lowering risk to an acceptable level by implementing safeguards. It evaluates vulnerabilities and applies countermeasures rather than merely identifying threats. This makes it an action-oriented analysis, ensuring risks are actively managed rather than just documented or observed.

Interface testing validates interactions between system components, especially in large integrated environments. It ensures that data flows correctly across subsystems. Unlike usability or input testing, its primary value is confirming that interconnected systems communicate reliably under operational conditions.

Backup tapes are designed for long-term recovery, not immediate access. Retrieving specific data from them is time-consuming and resource-intensive, making them legally and operationally classified as not reasonably accessible compared to active storage systems.

Common law is derived from judicial decisions rather than statutes. It evolved from English legal tradition and relies heavily on precedent. Courts interpret past rulings to guide decisions, making it adaptable and historically rooted.

Bluetooth uses SAFER due to its lightweight design and efficiency. It supports constrained environments where processing power and energy consumption are limited, making SAFER suitable for short-range wireless security.

A minimum security baseline defines the least set of controls applied enterprise-wide. It ensures consistent protection regardless of system or department, reducing weak links caused by uneven security implementations.

Confidentiality with proof of origin requires encryption with the recipient’s public key and signing with the sender’s private key. This ensures secrecy and verifies authorship simultaneously, combining encryption and digital signatures.

Confidentiality prevents unauthorized access to information. Encryption ensures data remains unreadable to unintended users on local networks, unlike authentication or integrity which serve different security objectives.

Risk transfer shifts financial consequences to a third party, such as an insurer. Purchasing cyber insurance does not reduce risk occurrence but mitigates financial impact if incidents occur.

Enterprise security architecture ensures alignment between security controls and other technology domains. This coordination prevents gaps, redundancy, and misalignment across systems.

TELNET transmits data in plaintext, exposing credentials and session data. Without encryption, attackers can intercept communications easily, making it unsuitable for secure environments.

Symmetric encryption uses a single shared key, simplifying key management for large user bases. It is efficient and practical for transactional systems like e-commerce platforms.

HVAC systems regulate temperature, airflow, and air quality. These functions directly affect indoor comfort and health, unlike surveillance or safety systems.

Remote access allows users to securely connect to systems from distant locations. It enables productivity, administration, and troubleshooting without physical presence.

Accreditation evaluates systems in conditions resembling real operations. It confirms readiness and compliance before deployment, unlike certification which focuses on component validation.

NIDS relies on packet inspection. Encryption obscures payloads, reducing visibility and detection accuracy, unlike host-based systems that monitor internal activity.

DSDM enforces timeboxing to control scope and delivery timelines. Fixed time periods ensure predictable progress and stakeholder alignment.

Data retention policies prioritize cost, access, and aggregation. Human resources are operationally involved but not a deciding factor in policy design.

Non-repudiation ensures senders cannot deny actions. Digital signatures provide cryptographic proof linking messages to originators.

Functional testing verifies outputs against requirements. It ensures reports, calculations, and displays reflect correct logic and data processing.

Triage begins once an incident is recognized. It assesses severity and determines immediate response priorities.

Polyalphabetic encryption uses varying substitution alphabets, increasing resistance to frequency analysis compared to monoalphabetic methods.

Substitution replaces plaintext characters with ciphertext equivalents. It does not change position, unlike transposition methods.

PLCs automate control logic in industrial systems. They are reliable, programmable, and widely deployed in manufacturing environments.

Notification occurs after analysis, not during investigation. The investigative phase focuses on detection and understanding.

Residual risk remains after controls are applied. Organizations must decide whether it is acceptable or requires further mitigation.

Preventive controls stop incidents before they occur. Firewalls and access controls reduce attack likelihood.

Integrity ensures data remains accurate and unaltered. Hashing and checksums verify content consistency.

Full backups contain complete datasets, enabling fastest restoration without dependency on other backups.

Risk assessment evaluates threat likelihood and impact, guiding control selection and prioritization.

SSH encrypts sessions and credentials, addressing TELNET’s security weaknesses and ensuring secure remote access.