Regarding SIP registration, which of the following description is incorrect?

Regarding SIP registration, which of the following description is incorrect?
A . Registration information must be refreshed regularly, usually Register saves the registration information in the Location Server.
B . The user needs to register with the server every time it starts up.
C . When the address of SIP Client changes, it needs to register again.
D . The function of SIP registration is to bind the AOR address to a certain Contact address, so that the Proxy can find the caller’s address when calling.

View Answer

Answer: D