Which protocol manages the breaking of a message into smaller packets that travel over the internet, reassembles them at the receiving end, and handles the address of each packet so it reaches the right destination?

TCP/IP splits a message into numbered packets, routes each by its address, and reassembles them in order at the destination.

HTTP only governs how web pages are requested and delivered above this transport layer.

PIP is not a recognised internet protocol for packet handling.

All of the above overreaches because HTTP and PIP do not perform this packet work.

Within this suite TCP ensures reliable ordered delivery while IP handles addressing and routing.

The same design lets the internet reroute packets around failed links automatically.