Question: What is the primary purpose of the IAB-IP-Address Information Element in Radio Resource Control (RRC) protocol, and what types of IP information does it support?
Option 1: To indicate a UE's (User Equipment) MAC address, supporting only IPv4 addresses.
Option 2: To negotiate QoS (Quality of Service) parameters, with options for both IPv4 and IPv6 prefixes.
Option 3: To authenticate user devices, exclusively using IPv6 addresses.
Option 4: To indicate an IP address or prefix, supporting both IPv4 addresses and IPv6 addresses/prefixes.
Explanation: The IAB-IP-Address Information Element conveys IP addressing information, supporting a choice between IPv4 addresses, IPv6 addresses, and even IPv6 prefixes, catering to various network configuration needs, especially in modern telecommunications where both IPv4 and IPv6 coexistence is crucial.