Question: In a 5G System, when an NSSF (Network Slice Selection Function) service instance redirects an HTTP request to another NSSF instance within the same or different NSSF set using a redirect status code, how is the identity of the new NSSF indicated?
Option 1: Via the `NF Instance ID` in the request body
Option 2: Through a newly introduced `NSSF-Redirect-Header`
Option 3: In the `3gpp-Sbi-Target-Nf-Id` header of the redirect response (307 Temporary Redirect or 308 Permanent Redirect)
Option 4: By modifying the `Host` header with the new NSSF's URI
Explanation: This is because, according to specifications for HTTP redirection in the context of NSSF services, when an NSSF redirects a service request to another NSSF, it uses standard HTTP redirect status codes and includes the identity of the target NSSF in the `3gpp-Sbi-Target-Nf-Id` header of the response, ensuring seamless redirection while maintaining necessary service context.