The addressing layer lets several devices share a channel such as an
RS485 bus or a radio, with 16-bit addresses. A link can carry several
peers, each with its own stack of layers and its own id. Layers that work
between two devices only are rejected with broadcast addressing. The
fragmentation layer splits packets larger than the layers below allow,
and joins them again.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
