Free Practice Questions for IBM C1000-156 Exam

When the error "Insufficient disk space to complete data export request" is encountered, and the Export Directory property in the System Settings has the default configuration, the disk partition that needs to be checked is/store/ariel/events/exports. This directory is typically used for exporting event data in QRadar SIEM. The error indicates that the available disk space in this partition is insufficient to handle the export operation. Administrators should check the storage usage of this partition and manage the space by either cleaning up unnecessary files or expanding the storage capacity.

ReferencesQRadar SIEM V7.5 Administration Guide - Chapter on System Notifications and Disk Management

Forward: Data is forwarded to a specified destination. It is also stored in the database and processed by the Custom Rules Engine (CRE).

Drop: Data is dropped, meaning it is not stored in the database and is not processed by the CRE. If you select the “Drop” option, any events that match this rule are credited back 100% to the license.

Bypass Correlation: Data bypasses the CRE but is stored in the database. This option allows events to be used in analytic apps and for historical correlation runs. It’s useful when you want specific events to skip real-time rules.

Log Only (Exclude Analytics): Events are stored in the database and flagged as “Log Only.” They bypass the CRE and are not available for historical correlation. These events contribute to neither offenses nor real-time analytics.

Now, let’s look at the valid combinations:

Forward and Drop: Data is forwarded to a specified destination, but it is not stored in the database or processed by the CRE. Dropped events are credited back to the license.

Forward and Bypass Correlation: Data is forwarded to a destination and stored in the database, but CRE rules do not run on it. Useful for scenarios where you want events to bypass real-time rules but still be available for historical correlation.

Forward and Log Only (Exclude Analytics): Events are forwarded to a destination, stored as “Log Only,” and bypass the CRE. They are not available for historical correlation and are credited back to the license.

In IBM QRadar SIEM V7.5, the default value for the maximum number of active offenses is set to 2500. This limit is in place to manage system performance and ensure efficient processing of security incidents. Here’s the detailed information:

Default Setting: The default setting for the maximum number of active offenses is 2500.

Impact: If this limit is reached, QRadar will not generate new offenses until some of the existing offenses are closed or archived.

Configuration: Administrators can adjust this setting based on their organizational needs, but the default value is 2500.

ReferencesThis information is detailed in the QRadar SIEM configuration and tuning guides, which specify default settings and provide instructions for modifying the maximum number of active offenses if necessary.

Administrators can download QRadar security content from the following two resources:

QRadar Application Repository: This repository contains a wide range of applications, rules, reports, and other content specifically designed for QRadar.

IBM Security App Exchange: A platform where users can find and download security applications, including those for QRadar. It offers a variety of tools to extend and enhance the functionality of QRadar SIEM.

These resources provide curated and validated security content, ensuring that administrators have access to the latest and most effective tools for their security needs.

ReferencesIBM QRadar documentation and support resources detail the QRadar Application Repository and IBM Security App Exchange as primary sources for downloading and updating QRadar security content.

To optimize event and flow payload searches for log data stored for up to a month, an administrator should configure the retention period for payload indexes. Here’s the process:

Retention Period Configuration: Set the retention period for payload indexes to match the desired data storage duration (e.g., one month).

Improved Search Efficiency: By configuring the retention period appropriately, QRadar ensures that the indexed data is efficiently searchable, improving performance during searches.

Index Management: Regularly manage and clean up indexes to maintain optimal system performance and storage utilization.

ReferencesThe IBM QRadar SIEM administration guides provide instructions on configuring retention periods for various types of indexes, including payload indexes, to optimize search performance.

The Server Discovery function in IBM QRadar SIEM V7.5 uses the Asset Profile Database to discover various types of servers on a network. This database stores detailed information about the assets, including server types, configurations, and roles within the network. Here’s how it works:

Asset Profile Database: This is the central repository that contains all the discovered asset information.

Discovery Process: During the discovery process, QRadar scans the network to identify servers and other devices, collecting information such as IP addresses, open ports, services, and operating systems.

Classification: The collected data is then analyzed and classified, updating the Asset Profile Database with the types of servers discovered.

ReferencesIBM QRadar SIEM documentation specifies the use of the Asset Profile Database for server discovery functionalities and provides details on configuring and managing asset profiles.

In IBM QRadar SIEM V7.5, using a quick filter search requires the correct syntax to find specific elements within the event logs. The correct string to search for the elements10.100.100.*,Bluecoat, andTCP_REFRESH_MISis:

String Structure:"10.100.100.*%AND%Bluecoat%AND%TCP_REFRESH_MIS"

Elements: This string combines the IP address pattern, device type, and specific event message using%AND%to ensure that all three elements are included in the search results.

Quotation Marks: The quotation marks are necessary to group the search terms and ensure that the search engine interprets them correctly.

ReferencesIBM QRadar SIEM search documentation provides guidelines on using quick filter searches and the correct syntax for combining multiple search terms.

To ensure that a rule in IBM QRadar SIEM V7.5 does not send an email more than 10 times in a 24-hour period, the "response limiter" can be used. Here’s how it works:

Response Limiter: This feature limits the number of times a rule action (such as sending an email) can be executed within a specified timeframe.

Configuration: Set the response limiter to a maximum of 10 actions in 24 hours.

Implementation: Apply the response limiter to the rule, ensuring that even if the rule conditions are met multiple times, the email will only be sent up to the specified limit.

ReferencesIBM QRadar SIEM documentation on rule management and tuning includes detailed instructions on using the response limiter to control the frequency of rule actions.