Question: In a 3GPP IP Multimedia Subsystem (IMS) registration scenario where a Web WebSocket Server Function (WWSF) assigns Public and Private User Identities, what is the relationship between the assigned IMS identities and the user's web identity authenticated by the WWSF or Web Application Function (WAF)?
Option 1: The assigned IMS identities are always linked to the user's web identity for authentication purposes.
Option 2: There is no linkage between the user’s web identity that may be authenticated by the WWSF or the WAF and the assigned IMS identities.
Option 3: The linkage between the two identities depends on the deployment model chosen by the IMS operator.
Option 4: The WWSF always authenticates the user's web identity before assigning IMS identities, establishing a direct link.
Explanation: In this specific IMS registration scenario, the WWSF assigns IMS identities (IMPU/IMPI pairs) independently of the user's web identity authentication process. This means that even if the WWSF or WAF authenticates a user's web identity, there is no inherent linkage between this web identity and the IMS identities assigned for service access. This distinction highlights the separation of authentication processes in this particular telecom setup.