In which layer of Cisco Unified Communications system architecture does Cisco Jabber reside?

A.
Operations and serviceability

B.
Applications and services

C.
Networking

D.
Call control

E.
Call routing

Explanation:
Business Edition 6000 for System Engineers (BE6KSE)PEC Training Architecture of the Cisco Unified
Communications System
http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/srnd/9x/ovapps.html (see figure 20-1.
Cisco Jabber is a collaboration client)