Question: What is the primary purpose of the Network Element Identifier (NEID) in the context of Lawful Interception (LI), and what format can it optionally take?
Option 1: To uniquely identify the network element performing LI operations, optionally taking the form of an E.164 international node number, X.25 address, or IP address.
Option 2: To provide a backup for the Operator Identifier in case of failure, mandatorily in the format of an E.164 international node number.
Option 3: To generalize network operator identification across different service providers, only in the format of an X.25 address.
Option 4: To encrypt LI activation signals, with its format always being an IP address for security reasons.
Explanation: The Network Element Identifier (NEID) is intended to uniquely identify the network element carrying out Lawful Interception operations. It can optionally take the forms of an E.164 international node number, an X.25 address, or an IP address, highlighting the importance of precise identification in LI scenarios for technical and regulatory compliance.