In NetWeaver Gateway Central Hub DEPLOYMENT − UI layer and SAP NetWeaver gateway is contained in ABAP Front-end server. The ABAP back end server contains business LOGIC and back end data.

Separating business logic and back end data from UI layer has below advantages:

1. Single Point of maintenance for UI issues- such as browser support and updated VERSION of SAP UI5 libraries.
2. Central place for theming and branding SAP Fiori Apps.
3. Routing and composition of multiple backend systems is SUPPORTED.
4. Single Point of access to backend systems and enhanced security because of no direct access to backend system.
5. SAP RECOMMENDS Central Hub deployment especially for Productive environment. Separate NetWeaver Gateway system is required.

In NetWeaver Gateway Central Hub deployment − UI layer and SAP NetWeaver gateway is contained in ABAP Front-end server. The ABAP back end server contains business logic and back end data.

Separating business logic and back end data from UI layer has below advantages: