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Horizontal Discovery vs Top-Down Discovery in ServiceNow

Hello friends,

Welcome to this new blog for ServiceNow Spectacular.

This blog is dedicated to one of the fundamental topics of the ServiceNow discovery process. It provides you with the simplest and easiest explanation of Horizontal and top-down discovery.

Horizontal Discovery vs. Top-Down Discovery?

Horizontal DiscoveryTop-Down Discovery
DefinitionDiscovers and maps infrastructure devicesDiscovers and maps dependencies and relationships between infrastructure components
ApproachScans the network horizontallyBegins discovery from a specific device and explores its dependencies recursively
FocusDevice-centricDependency-centric
Discovery SpeedFasterSlower
Depth of DiscoveryLimited to discovered devicesExtends beyond discovered devices
Advantages– Quick identification of devices– Detailed understanding of dependencies
– Efficient for large networks– Accurate representation of the environment
– Useful for network device management– Enhanced troubleshooting capabilities
Disadvantages– May miss dependencies between devices– Time-consuming for complex environments
– Limited visibility into relationships– Potentially resource-intensive

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