Setting Up Discovery in ServiceNow? The Secret You Need To Know! 

Setup Discovery in ServiceNow
Discovery finds computers, servers, printers, various IP-enabled devices, and the applications that run on them. It can then update the CIs in your CMDB with the data it collects.
There are two types of discovery:
Horizontal discovery:
Horizontal discovery is a technique that Discovery uses to scan your network, find computers and devices, and then populate the CMDB with the CIs it finds
Top-down discovery:
Top-down discovery is a technique that Service Mapping uses to find and maps CIs that are part of business services, such as an email service.
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