Question: What is the purpose of using IMEI-TAC instead of TAC in the relay node OAM system FQDN construction?
Option 1: To identify the relay node's vendor and model.
Option 2: To separate the type allocation code from the tracking area code (TAC).
Option 3: To authenticate the relay node with the EUTRAN OAM system nodes.
Option 4: To provide additional security features for the relay node.
Explanation: IMEI-TAC is used instead of TAC to distinguish between the type allocation code and the tracking area code, ensuring that each code serves its specific purpose in identifying and managing relay nodes within an operator's network.