In which layer of Cisco Unified Communications system architecture do voice and video endpoints reside?

A.
Applications and services

B.
Call control

C.
Call routing

D.
Networking

E.
Operations and serviceability

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/uc_system/UC6.0.1/system_description/SDIPC.html (See
table A-1)