Question: What is the purpose of bit "0", also known as the "AMF separation bit", in the AMF?
Option 1: It is reserved for future standardization use.
Option 2: It is used for the purposes of EPS (Evolved Packet System) and specified in various 3GPP specifications for different access types to EPS.
Option 3: It can be used for proprietary purposes.
Option 4: It shall always be set to 1.
Explanation: The AMF separation bit is used for the purposes of EPS (Evolved Packet System) and specified in various 3GPP specifications, such as TS 33.401 for E-UTRAN access to EPS, TS 33.402 for non-3GPP access to EPS, and TS 33.501 for 5G-RAN access to 5G System.