ifupdown
The classic Debian network setup, where /etc/network/interfaces describes each interface and ifup and ifdown bring it up or down.
In more detail
Debian servers still use it, while Ubuntu replaced it with netplan and Red Hat systems use NetworkManager. An auto line brings the interface up at boot.
Taught in
- Network Settings That Survive A Reboot — LPIC-1 Linux Administrator (101-500 and 102-500) Exam Prep