In the data analytics process, the first step after obtaining data is to ensure its completeness and accuracy. If data is incomplete or inaccurate, the entire analysis process is compromised, leading to unreliable results.
Let's analyze each option:
Option A: Verify completeness and accuracy.
Correct.
Completeness ensures that all necessary data points are included, preventing missing or incomplete datasets.
Accuracy ensures that data values are correct and free from errors, ensuring reliability for analysis.
IIA Reference: Internal auditors use data validation techniques to confirm completeness and accuracy before analysis. (IIA GTAG: Auditing with Data Analytics) Option B: Verify existence and accuracy.
Incorrect. While existence is important (ensuring data is valid and not fabricated), completeness is more critical in the initial step to avoid missing data.
Option C: Verify completeness and integrity.
Incorrect. Integrity refers to the reliability and consistency of data across systems, which is a later step after verifying completeness and accuracy.
Option D: Verify existence and completeness.
Incorrect. Existence is less relevant at the initial stage than accuracy, which is crucial for avoiding misinterpretation of results.
Thus, the verified answer is A. Verify completeness and accuracy.

A router and a switch serve different functions in a network.
* A router is responsible for connecting multiple networks together and directing data packets between them. It determines the best path for data to travel using IP addresses.
* A switch, on the other hand, operates within a single network and connects devices like computers, printers, and servers. It uses MAC addresses to forward data within the local network (LAN).
* A. A router operates at layer two, while a switch operates at layer three of the OSI model - Incorrect. A switch operates at Layer 2 (Data Link Layer), while a router operates at Layer 3 (Network Layer).
* B. A router transmits data through frames, while a switch sends data through packets - Incorrect
. Switches use frames at Layer 2, while routers use packets at Layer 3.
* C. A router connects networks, while a switch connects devices within a network (Correct Answer) - This correctly differentiates their functions.
* D. A router uses a media access control (MAC) address during the transmission of data, while a switch uses an internet protocol (IP) address - Incorrect. A switch uses MAC addresses, and a router uses IP addresses.
* IIA GTAG 17 - Auditing IT Governance discusses network security and the role of routers and switches.
* COBIT 2019 - DSS01 (Managed Operations) emphasizes secure and efficient network management.
* NIST SP 800-53 - Security Controls for IT Systems includes guidelines on network architecture and device functionality.
Explanation of Each Option:IIA References:

Explanation/Reference: