Which of the following statements is CORRECT about configuring a SIP trunk on the U1900?

Which of the following statements is CORRECT about configuring a SIP trunk on the U1900?
A . Different domain names can map the same IP address.
B . A domain name can map different IP addresses.
C . Domain names and IP addresses must have a one-to-one mapping relationship.
D . The domain name must be the same as that configured on the peer device connected to the SIP trunk.

Answer: C