Refer to the exhibit. 

Which user agent has the recipient role in this SIP REFER call transfer? 

Answer options:

A. user agent A
B. user agent B
C. user agent C
D. user agent B and C
E. user agent A and B

B

The Refer method has three main roles:OriginatorUser agent that initiates the transfer or Refer request.RecipientUser agent that receives the Refer request and is transferred to the final-recipient.Final-RecipientUser agent introduced into a call with the recipient. References: http://www.cisco.com/c/en/us/td/docs/ios_xr_sw/iosxr_r3-4/sbc/configuration/guide/sbc_c34/sbc34stx.pdf