Don't automatically assume so. I live in Belgium where we have two major ISPs,
Telenet uses coax cable to connect the coaxial wall plug-modem, whereas Belgacom uses a VDSL 2 infrastructure
with a regular blue RJ45 cable to connect NTP TF 2007-Modem. Both are possible.
VDSL 2 for private clients here is limited up to 30 Mbps, while the Telenet coax network goes up to 100 Mbps.