Question: In a 5G LAN-type service, how does the 3GPP system support efficient routing of non-IP packets (e.g., Ethernet frames) between UEs for private communication?
Option 1: Based on information extracted from Virtual LAN (VLAN) ID and utilizing Spanning Tree Protocol (e.g., RSTP) for network topology awareness.
Option 2: Solely through the use of source and destination IP addresses, ensuring QoS based on latency, reliability, and bandwidth.
Option 3: By converting all non-IP packets to IP packets before routing, utilizing traditional IP routing protocols.
Option 4: Exclusively via traffic filtering and prioritization based on Ethertype, without considering VLAN IDs or MAC addresses.
Explanation: The correct answer is Option 1 because the 3GPP system is specified to support routing of non-IP packets (like Ethernet frames) efficiently in a 5G LAN-type service by extracting information from Virtual LAN (VLAN) IDs. Additionally, the system’s ability to extract information from Bridge Protocol Data Units created based on Spanning Tree Protocols (e.g., RSTP) enhances its network topology awareness, facilitating more efficient routing decisions for private communications between UEs. This approach aligns with the requirements for supporting QoS (reliability, latency, and bandwidth) for such non-IP packet transmissions.