Question: In a Diameter-based Cx/Dx interface, what is the composition of the SIP-Authorization AVP when included in an Authentication Request?
Option 1: Concatenation of XRES and RAND, both binary encoded.
Option 2: Concatenation of RAND (16 octets) and AUTS (14 octets), both binary encoded.
Option 3: Solely contains AUTS (30 octets), as received from the terminal, in binary format.
Option 4: Contains only RAND (30 octets), sent to the terminal, in a hexadecimal format.
Explanation: When the SIP-Authorization AVP is included in an Authentication Request within the Diameter protocol for Cx/Dx interfaces, it specifically combines two critical components: RAND (16 octets) and AUTS (14 octets). Both of these elements are binary encoded. RAND is initially sent to the terminal, while AUTS is received from it. This precise composition is crucial for authentication processes in telecom networks, ensuring secure communication between the network and user equipment (UE).