Which of the following techniques is used for Time-To-Line (TTL)?

A technique used to best-effort delivery systems to avoid endlessly looping packets.

A technique used by protocols in which a lower level protocol accepts a message from a higher level protocol and places it in the data portion of the law level frame.

One of the pieces that results when an IP gateway divides an IP datagram into smaller pieces for transmission across a network that cannot handle the original datagram size.

All of these