Question: What does an Address Type value of '00' indicate for the HPLMN ProSe Function address in EFPROSEFUNC, and how is the corresponding address encoded?
Option 1: Indicates FQDN (Fully Qualified Domain Name), with the address encoded according to UTF-8 encoding rules as specified in IETF RFC 3629.
Option 2: Indicates IPv4, with the address represented in dotted decimal format.
Option 3: Indicates IPv6, with the address compressed for storage.
Option 4: Is reserved and not currently used for any address type.
Explanation: According to the specification, an Address Type value of '00' signifies that the HPLMN ProSe Function address is a Fully Qualified Domain Name (FQDN). Moreover, it's crucial to note that when the address type is set to FQDN ('00'), the corresponding address must be encoded as an octet string following UTF-8 encoding rules, ensuring compatibility and proper interpretation. Unused bytes in such encodings are set to 'FF'. This precise detail underscores the importance of correct encoding for effective communication within telecom networks, particularly in ProSe (Proximity Services) functionalities.