For INVITE transaction, messages are retransmitted at intervals of () by default.

For INVITE transaction, messages are retransmitted at intervals of () by default.
A . 500ms, 1s, 2s, 4s, 4s, 4s
B . 500ms, 1s, 2s, 4s, 8s, 16s
C . 500ms, 1s, 2s, 4s, 8s, 8s
D . 500ms, 1s, 2s, 4s, 16s, 16s

View Answer

Answer: B