On Tue, 09 Jul 2019 10:38:19 -0500, Char Jackson wrote:

Broadband is irrelevant when discussing LAN architectures. Broadband is
WAN, a whole different animal.

It's still relevant because both WAN and LAN need Ethernet adapters!

Huh?

Google says:

noun: broadband
high-capacity transmission technique using a wide range of frequencies

Notice "wide range of frequencies"

Google says:

Radio frequency (RF) refers to the rate of oscillation of
electromagnetic radio waves in the range of 3 kHz to 300 GHz,
as well as the alternating currents carrying the radio signals.
This is the frequency band that is used for communications
transmission and broadcasting.

Notice "frequency band"

Now put "wide range of frequencies" and "frequency band" together. That
works, since both have "frequency"

What do you get? Looks like BROAD (wide) BAND to me.