CIS-Discovery Exam Dumps - ServiceNow Certified Implementation Specialist Questions and Answers

The SNMP Query operation on a pattern for a custom device query allows Discovery to retrieve information from the target device using the SNMP protocol. It is best practice to use the published manufacturer’s device MIB, which is the official and standard definition of the device’s SNMP data. Using the manufacturer’s device MIB ensures that the query is accurate, consistent, and compatible with the device. Modifying the default MIB information, enabling SSH as a secondary protocol, or using live devices in production are not recommended practices, as they may introduce errors, security risks, or performance issues123.

References:

• SNMP Query pattern operation - Product Documentation: San Diego - Now Support Portal
• Load a MIB file - Product Documentation: Vancouver - ServiceNow
• How Loading of MIB file works on SNMP Browser ( Pattern Step - SNMP Query) - Support and Troubleshooting

In ServiceNow Discovery, when encountering the error 'Active, couldn't classify' during the discovery of a new SNMP network device, it typically indicates an issue with the classification process. Classification is a crucial initial step in the Discovery process, where the system determines the type of device it is interacting with. If an SNMP Classification rule for the new device type does not exist or needs updating, Discovery will be unable to classify and thus properly discover the device. Incorrect SNMP credentials or firewall issues usually result in different types of errors, such as authentication failures or no response from the device.

A horizontal discovery pattern is a sequence of operations that collects information about a specific type of configuration item (CI), such as an operating system, a database, or a web server1. A horizontal discovery pattern does not use the connectivity section, which is only used for the application pattern type2. The connectivity section defines how to connect to a CI and run commands on it3. A horizontal discovery pattern uses the following sections1:

• Variables: Defines the variables that store the data collected by the pattern and map them to the target table fields.
• Identification: Defines the criteria to identify a CI and update or create a record in the CMDB.
• Operations: Defines the actions to perform on the target CI, such as running commands, querying databases, or parsing files.

References: 1: ServiceNow Docs - Horizontal discovery patterns 2: ServiceNow Docs - Application pattern types 3: ServiceNow Docs - Connectivity section

 Discovery can provide information about the relationships between configuration items (CIs), including applications and hosts. Application relationships are the connections between applications that run on different hosts or servers, such as web servers, databases, load balancers, etc. Host relationships are the connections between applications and the hosts or servers that they run on, such as Windows, Linux, Unix, etc. Discovery can identify these relationships using various methods, such as probes, sensors, patterns, file-based discovery, etc. Discovery can also create and update these relationships in the CMDB, using the Depends on::Used by or Runs on::Runs relationship types.

References: Discovery Relationship Creation, Application Discovery Mapping Overview, IT Discovery – Application Dependency Mapping

The recommended method for excluding specific software from discovery on Windows and Unix Servers in ServiceNow Discovery is by modifying the probes. Probes are the components in ServiceNow that collect data from devices. By modifying the probes, specific software can be excluded from the discovery process. Options A, C, and D are less direct methods for achieving this specific requirement. References = ServiceNow Discovery documentation, particularly in the sections related to probe configuration and modification.

The mid.discovery.max_pattern_payload_size property defines the maximum overall size for the returned payload that comes from patterns. This property is set on the MID Server and applies to all patterns that run on that MID Server. If the payload size exceeds this limit, the pattern execution fails and an error message is logged in the ECC queue. The default value of this property is 10 MB1.

References: 1: ServiceNow Docs - MID Server properties for Discovery and Service Mapping 2: ServiceNow Docs - Discovery payload size and processing

The CMDB contains records of configuration items (CIs) and their relationships. A CI is any component that needs to be managed in order to deliver an IT service, such as a server, an application, or a user. A relation type defines the nature of the connection between two CIs, such as depends on, uses, or contains. A model is a template for a CI that defines its attributes and default values. An asset is a tangible or intangible resource that is tracked and managed by the organization, such as a laptop, a license, or a contract.

References:

• Configuration Item (CI) types: Attributes and relationships
• What is a configuration management database (CMDB)?
• CSA Challenge Questions Flashcards

Debug mode is a feature of the Pattern Designer that allows you to test and troubleshoot your patterns in real time. To activate Debug mode, you need to have the admin role or a role that includes the pattern_designer_debug permission. Debug mode is not available for users who only have the pattern_designer_read permission1.

References: 1: Activate pattern Debug mode - Product Documentation: San Diego - ServiceNow

The ECC Queue is the normal connection point between an instance and other systems that integrate with ServiceNow, such as MID Servers1. The ECC Queue displays input and output messages from and to MID Servers2. The actual XML payload that is sent to or from an instance is stored in the ECC Queue3. The ECC Queue also provides a connected flow of probe and sensor activity, as probes are sent from the instance to the MID Server, and sensors are sent from the MID Server to the instance2.

References:

• 1: ServiceNow Discovery Overview
• 2: ECC Queue Processing and Debugging, with “Discovery - Sensors” used as an example
• 3: Manage ECC Queue content for a MID Server

The Extension section in a horizontal pattern is executed after the Identification sections have completed and the CI has been identified. The Extension section allows adding additional attributes or relationships to the CI, or launching other patterns for further discovery12.

References:

• 1: ITOM: Extending Discovery/Service Mapping Patterns - GlideFast ServiceNow
• 2: Horizontal Pattern probe - Product Documentation: San Diego - ServiceNow