In high-speed local networks where the physical cable quality is high, what often becomes the hidden constraint on speed?

Answer

Hardware processing power ceiling (e.g., NIC or CPU bottleneck).

When physical limitations are overcome, the bottleneck shifts to intermediate hardware components, like routers or network interface cards, whose processing speed limits the rate of encoding and decoding signals.

In high-speed local networks where the physical cable quality is high, what often becomes the hidden constraint on speed?
limitspeedtransmissiondata