The establishment, maintenance and dismantling of a session is completed through a series of message interactions between the SIP user and the server, so each information contained in the SIP text is unique, and no single information will appear A phenomenon in which a value occurs multiple times.

The establishment, maintenance and dismantling of a session is completed through a series of message interactions between the SIP user and the server, so each information contained in the SIP text is unique, and no single information will appear A phenomenon in which a value occurs multiple times.
A . True
B. False

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Answer: B