Question: In a 5GS network, what is the expected format for the NAI (Network Access Identifier) in the SUCI (Subscription Concealed Identifier) when the SUPi (SUPI) Type is set to 1?
Option 1: type0.rid16.schid0.hnkey10.ecckey<...>.cip<...>.mac<...>@example.net
Option 2: type1.rid17.schid1.hnkey30.ecckey<ECC ephemeral public key>.cip<encryption of "username">.mac<MAC tag value>@3gpp.com
Option 3: type2.rid18.schid2.hnkey40.ecckey<...>.cip<...>.mac<...>@example.io
Option 4: type1.rid17.schid0.hnkey20.ecckey<ECC ephemeral public key>.cip<encryption of "longusername">.mac<MAC tag value>@3gpp.org
Explanation: The correct answer, Option 2, aligns with the specified format for NAI in SUCI when SUPi Type is 1, including the correct type, routing indicator, scheme ID, home network public key ID, and structure for the scheme output (ECC ephemeral public key, encryption of a username, and MAC tag value), crucial for secure identification in a 5GS mobile network.