ServiceNow Updated CIS-Discovery Exam Questions and Answers by aylah

An extension section of a discovery pattern is a section that allows you to modify or extend the functionality of an existing pattern without customizing it. An extension section can contain shared libraries, which are reusable code snippets that can be invoked from any pattern or extension section. Shared libraries can be used to define common functions, variables, or constants that are used across multiple patterns or extension sections. Shared libraries can also be used to override the default behavior of some built-in functions, such as identification or classification12. References = 1: ITOM: Extending Discovery/Service Mapping Patterns - GlideFast ServiceNow 2: How to Create Discovery Pattern Extensions and Why to Use Them

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.

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.

Credential-less Discovery is a feature of ServiceNow Discovery that allows the instance to identify configuration items (CIs) without using credentials. Credential-less Discovery uses Network Mapper (Nmap), a free and open-source network scanner, to collect information about the CIs by sending packets and analyzing the responses. Nmap must be installed on the MID Server that runs Credential-less Discovery. Credential-less Discovery can be used as a fallbackoption when credential-based probes fail, or as a primary option for scanning certain types of devices, such as network devices, printers, or IoT devices12.