Which two options in VCS-C and VCS-E handle presence status for registered endpoints? (Choose two.)

Posted by: Pdfprep Category: 300-085 Tags: , ,

Which two options in VCS-C and VCS-E handle presence status for registered endpoints? (Choose two.)
A . back to back user agent
B . presence user agent
C . domain name system
D . presence server
E . presence proxy

Answer: BD

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