Which of the following are the responsibilities of SIEM Agents? 1. Collecting data received from various devices sending data to SIEM before…

The primary responsibilities of SIEM agents (also known as collectors or forwarders) are collecting and normalizing data.
1. Collecting: Agents are deployed on endpoints or as listeners on the network to gather log and event data from a wide variety of sources.
2. Normalizing: Before forwarding the data to the central SIEM engine, agents parse the diverse log formats and transform them into a standardized, common schema. This pre-processing step is crucial for ensuring that data from different sources can be understood and processed consistently by the central engine for later analysis and correlation.

B. 2 and 3: Correlation (3) requires a global view of data from many sources to identify patterns and is a core function of the central SIEM engine, not an individual agent.
C. 1 and 4: Visualization (4) is a function of the SIEM's user interface or console, which presents analyzed data to the SOC analyst through dashboards and reports.
D. 3 and 1: Correlation (3) is not an agent's responsibility; it is performed centrally after agents have collected (1) and normalized the data.

1. National Institute of Standards and Technology (NIST). (2006). Guide to Computer Security Log Management (Special Publication 800-92). Section 4.2.2, "Decentralized Log Management," p. 4-3. This section describes architectures where "log parsers" (analogous to agents) pre-process logs before sending them to a central server, which aligns with the function of normalization.

2. Casola, V., De Benedictis, A., Rak, M., & Villano, U. (2016). A novel approach to the design of a distributed SIEM system. 2016 IEEE International Conference on Communications (ICC), 1-6. Section II.A, "The SIEM Architecture," describes the role of "Local Agents" in collecting and pre-processing events before they are sent to a central correlator. (DOI: 10.1109/ICC.2016.7510801)