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description: Exploring the functional elements of AppLayer.
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# How AppLayer works

This chapter aims to show an overview on the more conceptual parts of the AppLayer system and how they work. Check the subchapters for more details.

AppLayer’s functionality is contained in five primary components: _Validators_, _Sentinels_, _AppLayers_, _Chain Abstraction_ and _rdPoS_, the latter of which is separated into its own chapter.
