Exam 350-801 topic 1 question 187 discussion

should be C. Phone register with CUCM.

Phone registers with CUCM. C is correct answer

MRA is always register with CUCM

Anything login through MRA registerered to CUCM, Jaber/Phone. So the correct answer is C.

MRA end point registers to CUCM

Certainly CUCM - p.254 cisco reference CLCOR- the Cisco Unified IP phones cannot register to the Cisco Expressway. A proxy registration function using Mobile and Remote Access (MRA) allows Cisco Unified IP phones to register to the Cisco Unified Communications Manager through the Expressway Core and Edge, but in this type of deployment, the registration is still to the Cisco Unified CM.

C Just tested Jabber (BOT) MRA,device registered with CUCM

Page 11 in the below link, I believe, cleared the confusion Jabber An example remote endpoint, which is registering over the internet to Unified CM via the Expressway-E and Expressway-C. While EX60 An example remote endpoint, which is registering to the Expressway-E via the internet. The correct answer appears to be (Expressway-E), because Jabber was not specifically mentioned in the Question??? https://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/expressway/config_guide/X12-5/Cisco-Expressway-Basic-Configuration-Deployment-Guide-X12-5-4.pdf

Detailed MRA / Jabber Client process @ https://netcraftsmen.com/cisco-mobile-remote-access-troubleshooting-basic-connectivity/

C is the correct answer