Question: In a scenario where the Authentication Framework (AF) for TLS certificates is absent, what is the primary role of CAA (Certification Authority in A's network) as described in alternative guidelines for manual TLS certificate handling?
Option 1: To verify and validate CertB (Certificate of B) for A's set of trusted peers.
Option 2: To issue and manage CertA (Certificate of A) for use within A's network domain.
Option 3: To authenticate the identity of User Equipment (UE) attempting to access B's network.
Option 4: To establish a secure connection between TB (Trusted Peers by B) and external networks.
Explanation: In the absence of an Authentication Framework for TLS certificates, manual handling relies on trust established through certification authorities. CAA's primary role in this context would be to verify and validate certificates from other networks (e.g., CertB from B's network) to ensure A can securely identify and trust peers from B's network, thus facilitating secure communication between different network domains.