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NEW QUESTION # 40
(Which of the following describes the method in which data is encrypted first with an encryption key and then wrapped by a managed root key?)
Answer: A
Explanation:
The correct answer is D. Envelope encryption. CompTIA DataSys+ describes envelope encryption as a key management and data protection method that combines the efficiency of symmetric encryption with the security and manageability of hierarchical key structures. In this approach, data is first encrypted using a data encryption key (DEK), and then the DEK itself is encrypted (or "wrapped") using a key encryption key (KEK), often referred to as a managed root key.
Envelope encryption is widely used in enterprise database systems and cloud platforms because it provides strong security while simplifying key rotation and management. Encrypting large volumes of data directly with a root or master key would be inefficient and risky. Instead, DataSys+ explains that symmetric DEKs are used for fast data encryption, while the root key is used only to protect the DEKs. If a root key must be rotated or compromised, only the wrapped DEKs need to be re-encrypted-not the underlying data.
Option A, asymmetric encryption, uses public and private key pairs but is computationally expensive and not typically used to encrypt large datasets directly. Option B, DEK-based encryption, is incomplete because it describes only the use of data encryption keys and does not account for the additional wrapping layer that defines envelope encryption. Option C, symmetric encryption, correctly describes how data is encrypted but does not include the managed key hierarchy required by the question.
CompTIA DataSys+ emphasizes envelope encryption as a best practice for data-at-rest protection, particularly in environments that require compliance, auditing, and centralized key management. It is commonly implemented using hardware security modules (HSMs) or cloud key management services.
Therefore, the method where data is encrypted with a DEK and then wrapped with a managed root key is envelope encryption, making option D the correct and fully verified answer.
NEW QUESTION # 41
Which of the following have data manipulation and procedural scripting power? (Choose two.)
Answer: C,E
Explanation:
The two options that have data manipulation and procedural scripting power are PL/SQL and T- SQL. PL/SQL, or Procedural Language/Structured Query Language, is an extension of SQL that adds procedural features to SQL for Oracle databases. PL/SQL allows users to create and execute stored procedures, functions, triggers, packages, etc., using variables, loops, conditions, exceptions, etc., in addition to SQL commands. PL/SQL helps improve the performance, functionality, modularity, and security of SQL queries and applications. T-SQL, or Transact-SQL, is an extension of SQL that adds procedural features to SQL for Microsoft SQL Server databases.
T-SQL allows users to create and execute stored procedures, functions, triggers, etc., using variables, loops, conditions, exceptions, etc., in addition to SQL commands. T-SQL helps improve the performance, functionality, modularity, and security of SQL queries and applications. The other options are either not related or not having both data manipulation and procedural scripting power. For example, PQL, or Power Query Language, is a data analysis and transformation language for Microsoft Power BI and Excel; Advanced SQL is a term that refers to the advanced features or techniques of SQL, such as subqueries, joins, aggregations, etc.; SQL, or Structured Query Language, is a standard language for manipulating and querying data in relational databases, but it does not have procedural features.
NEW QUESTION # 42
An on-premises application server connects to a database in the cloud. Which of the following must be considered to ensure data integrity during transmission?
Answer: D
Explanation:
The factor that must be considered to ensure data integrity during transmission is encryption.
Encryption is a process that transforms data into an unreadable or scrambled form using an algorithm and a key. Encryption helps protect data integrity during transmission by preventing unauthorized access or modification of data by third parties, such as hackers, eavesdroppers, or interceptors. Encryption also helps verify the identity and authenticity of the source and destination of the data using digital signatures or certificates. The other options are either not related or not sufficient for this purpose. For example, bandwidth is the amount of data that can be transmitted over a network in a given time; redundancy is the duplication of data or components to provide backup or alternative sources in case of failure; masking is a technique that replaces sensitive data with fictitious but realistic data to protect its confidentiality or compliance.
NEW QUESTION # 43
What technology may be used to perform disk-to-disk backups with systems designed to work only with tapes?
Answer: B
NEW QUESTION # 44
Which of the following best describes the policy/and or procedure that ensures records are kept in a database for a period of time and not deleted?
Answer: C
NEW QUESTION # 45
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