Which of the following SIP messages is used to ensure the reliability of the SIP temporary response?

Posted by: Pdfprep Category: H35-561-ENU Tags: H35-561-ENU exam questions, H35-561-ENU practice exam, HCNP-LTE RNP & RNO Post Date: November 19, 2020

Which of the following SIP messages is used to ensure the reliability of the SIP temporary response?
A . Prack
B . Ack
C . Update
D . 183

Answer: A