Question: In the context of IMS (IP Multimedia Subsystem), what is the primary purpose of the `Nhss_ImsUEAuthenticate_Get` service operation between the S-CSCF and HSS?
Option 1: To manage Quality of Service (QoS) for multimedia sessions.
Option 2: To exchange information for authenticating an end user with the home IMS network.
Option 3: To provision new Public User Identities for subscribers.
Option 4: To handle handover decisions in wireless networks.
Explanation: The `Nhss_ImsUEAuthenticate_Get` service operation is designed to facilitate the exchange of authentication-related information between the S-CSCF and HSS, verifying end user identities for secure access within their home IMS network.