InVRRP HSB (Hot Standby Backup)mode for WLAN deployments (typically between ACs or access controllers),backup of critical dataensures fast failover and minimal service disruption.
A: Real-time backup- Supported. Configuration and session information are synchronized in real-time between the active and standby ACs.
B: Scheduled synchronization-Not supported. HSB requires instant synchronization, not based on a scheduled time.
C: Batch backup- Supported. Some types of less time-sensitive data (e.g., logs or counters) may be backed up in batches.
D: Cloud backup-Not part of HSB functionality. Cloud backup is a separate mechanism, typically used for archival purposes, not real-time failover.
Reference from Huawei HCIP-Datacom-Core Technology Study Guide:
"VRRP HSB mode supports real-time and batch backup between ACs to protect WLAN services. Scheduled and cloud backups are not part of HSB functionality." (Chapter: WLAN Reliability - Section: AC Redundancy and HSB Mechanism)

The route-policy configuration specifies that node 10 matches the IP prefix11.1.0.0/16and applies a cost of
300 to this route. Once a route matches a node, it is no longer processed by subsequent nodes, making option D incorrect. Option B is also incorrect because only specific matching routes have their costs changed .

BFD control packets are encapsulated in UDP packets, and the destination port number for multi-hop BFD control packets is 4784. This is a standardized port for multi-hop BFD operation .

BGP Next_Hop Attribute
Unlike IGP, the Next_Hop attribute in BGP does not necessarily have to be the IP address of a peer interface.
For example, in multi-hop BGP configurations, the Next_Hop can point to a different router or interface within the network.
HCIP-Datacom-Core Reference
Details of the Next_Hop attribute and its behavior are outlined in BGP path selection principles.