Which of the following methods does SIP Server use to create a new SIP dialog? (Choose 2 answers)

Which of the following methods does SIP Server use to create a new SIP dialog? (Choose 2 answers)
A . INVITE
B . re-INVITE
C . REFER
D . REGISTER

View Answer

Answer: A,C

Explanation:

Reference: https://tools.ietf.org/html/rfc5057