A startup company wants to deploy the Cisco IP Telephony solution. Which two actions are appropriate design approaches? (Choose two.)
A. Connect user IP phones to the Ethernet switches of access layer.
B. Connect IP phones to the Ethernet switches of data center module.
C. Connect Cisco Unified Communications manager to the Ethernet switches of data center module.
D. Connect SIP trunks for PSTN connectivity to Ethernet switches of campus core layer.
E. Connect Cisco Unified Communications Manager to the Ethernet switches of the campus core layer.
Answer is AC
Data Center and Server Farm
Typically, Cisco Unified Communications Manager (Unified CM) cluster servers, including media resource servers, reside in a firewall-secured data center or server farm environment
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/srnd/collab11/collab11/netstruc.html#pgfId-1043794