Explanation
Device Management Protocol (DMP) is a protocol used between ICM Central Controller and IVR/CUCM PGs. It is used to send commands, such as to bring up a voice channel, to the PGs. OCTI, SIP, and ccagent are not protocols used between ICM Central Controller and IVR/CUCM PGs.
References: 500-444-demo, page 4.

Two considerations for Active Directory (AD) are that Read-Only Domain Controllers (RODC) are supported and that it supports multi-domain, single AD Forest topology. RODC are used to provide secure access to AD data in remote locations, and the multi-domain, single AD Forest topology allows multiple domains to be managed from a single AD forest. Additionally, global catalogs are required at each AD site to enable efficient searches across the entire AD forest. AD does not provide a user interface, but Remote Access Control is available for software that is used to manage and administer the AD environment.

A: When ICM Logger side A fails, ICM call router side B can't send historical information to ICM Logger side A and is limited to ICM Logger side
B: This is because ICM loggers act as a buffer between ICM call routers and the historical data store, and if one side fails, the other side can't send historical data to it. (Reference: https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cust_contact/contact_center/icm_enterprise/icm_enterprise_10_5/installation/guide/icm_install/icm_high.html) D: If one ICM call router of a duplex pair of Cisco Unified ICM call routers fails, the surviving ICM call router recognizes the failure when it receives no response to heartbeats over the private LAN. This is because ICM call routers communicate with each other over a private LAN using heartbeats. If one ICM call router stops sending heartbeats, the other ICM call router knows that it has failed and takes over the processing of calls. (Reference: https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cust_contact/contact_center/icm_enterprise/icm_enterprise_10_5/installation/guide/icm_install/icm_high.html) F: During Cisco Unified ICM call router failover processing, calls in progress in Cisco Unified Customer Voice Portal are disconnected, but all new calls are processed successfully. This is because when a Cisco Unified ICM call router fails, the surviving ICM call router takes over the processing of calls. This can cause calls in progress in Cisco Unified CVP to be disconnected, but new calls will be processed successfully. (Reference: https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cust_contact/contact_center/icm_enterprise/icm_enterprise_10_5/installation/guide/icm_install/icm_high.html) References: [1] https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cust_contact/contact_center/crs/express_8_5/design/guide/icm85des/icm85des_chap_01.html [2] https://www.cisco.com/c/en/us/support/docs/unified-communications/unified-contact-center-enterprise

Explanation
* SSO - Enable all agents and supervisors in the deployment for SSO.
* Hybrid - Enable agents and supervisors selectively in the deployment for SSO. ...
* Non-SSO - Continue to use existing Active Directory-based and local authentication, without SSO.
https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cust_contact/contact_center/pcce/pcce_12_6_1/maintena