Question: What is the primary characteristic of the 'Source eNB to Target eNB Transparent Container' Information Element (IE) in relation to the Evolved Packet Core (EPC)?
Option 1: It initiates a direct communication link between the EPC and external handover sources.
Option 2: It remains transparent to the EPC, passing through without interpretation or modification.
Option 3: It triggers an automatic update of subscriber data within the EPC upon handovers.
Option 4: It requires decryption by the EPC before forwarding to the target eNB.
Explanation: The 'Source eNB to Target eNB Transparent Container' IE is designed to be transparent to the EPC, meaning it is not interpreted, modified, or acted upon by the EPC. Instead, it is passed through to the target eNB, ensuring seamless handover processes, particularly in inter-system handovers to E-UTRAN. This transparency ensures efficient handling of handover data without requiring EPC intervention.