642-447 Exam Question

QUESTION No : 18

In a Cisco Unified Communications Manager 8.0 cluster, how is database replication accomplished for run-time data?

A. Replication is through a master database from publisher to all active subscribers.
B. Replication is a mesh from subscriber to subscriber and subscriber to publisher.
C. Replication is a hybrid using both a hierarchical and mesh process.
D. Replication is a push from subscriber to publisher.

Answer: B
Explanation:
The database replicates nearly all information in astar topology (one publisher, many subscribers). However, Cisco Unified Communications Manager nodes also use a second communication method to replicate run-time data in a mesh topology (every node updates every other node). This type ofcommunication is used for dynamic information that changes more frequently than database changes. The primary use of this replication is to communicate newly registered phones, gateways, and digital signal processor (DSP) resources, so that optimum routing of calls between members of the cluster and the associated gateways occurs.