Cable internet is IP smuggled onto coax that was built to carry TV channels, and almost every quirk of how it behaves traces back to that origin. We walk the spectrum layout, why the upstream is the bottleneck, channel bonding and the DOCSIS 3.0/3.1/4.0 progression, the CMTS and modem handshake, bufferbloat under load, and the honest comparison with fiber PON.
Isp
-
DOCSIS and How Cable Internet Works