Huawei iMaster NCE-Fabricis anAI-powered SDN controllerfordata center networks, offeringautomated rollback functionsto prevent misconfigurations.
(A) Tenant-Level Rollback (True):Allows rollback oftenant-specific configurations, ensuring isolation between network tenants.
(B) Service-Level Rollback (True):Enables rollback of individualnetwork serviceswithout affecting other operations.
(C) Network-Wide Rollback (True):Provides afull network rollbackto a previous stable state.
(D) Application-Level Rollback (False):Not a feature of iMaster NCE-Fabric; applications operate independently of network configuration rollback.
#Reference:HCSA-Presales-IP Network Official Study Guide, iMaster NCE-Fabric Rollback Functions

HuaweiSD-WAN architectureconsists of:
Physical Underlay Network:
Composed ofMPLS, Internet, or LTE links.
Providesbasic connectivitybetween branches and data centers.
Virtual Overlay Network:
Usestunnels (IPSec, GRE, VXLAN)to createlogical connectionsbetween sites.
Completely decoupledfrom thephysical underlay, enabling flexible traffic management.
#Reference:HCSA-Presales-IP Network Official Study Guide, SD-WAN Architecture