Question: Which transport and routing protocols are utilized by the KM-UU reference point for security-related information exchange between the key management server and client in a 5G System (5GS) architecture?
Option 1: SCTP (Stream Control Transmission Protocol) and Diameter
Option 2: HTTP-1 and HTTP-2 signalling control plane reference points
Option 3: TLS (Transport Layer Security) and FTP (File Transfer Protocol)
Option 4: SSH (Secure Shell) and SMTP (Simple Mail Transfer Protocol)
Explanation: In the context of 5G System (5GS) architecture, specifically for interactions related to key management functions as described in the SEAL (Service Enabler Architecture Layer for Verticals), the KM-UU reference point leverages HTTP-1 and HTTP-2 signalling control plane reference points. This is crucial for efficiently and securely transporting and routing security-related information, such as encryption keys, between the key management server and the client. The use of HTTP protocols in this context highlights the importance of standardized, web-compatible solutions for secure data exchange within telecom networks.