Question: What protocol was selected for SEGs (Security Edge Gateways) to access CRL (Certificate Revocation List) repositories in 3GPP Network Domain Security, despite its higher complexity compared to alternatives?
Option 1: HTTP - Due to its simplicity and wide support among various vendors.
Option 2: FTP - For its robust file transfer capabilities and security features.
Option 3: SFTP - To leverage secure file transfer protocol for enhanced security.
Option 4: LDAP - Chosen for its scalability, flexibility, and widespread implementation among PKI products.
Explanation: LDAP (Lightweight Directory Access Protocol) was selected due to its future-proof nature, offering advantages in scalability and flexibility, such as easy integration with other systems and automatic public key retrieval. Although it presents higher complexity compared to HTTP, its widespread establishment among PKI vendors and operators outweighed this drawback.