dhcp uses it by default nowadays.. but you can tell dhcp to use your mac address instead (like it used to).. https://askubuntu.com/questions/1498611/ubuntu-dhc

dhcp uses it by default nowadays.. but you can tell dhcp to use your mac address instead (like it used to).. https://askubuntu.com/questions/1498611/ubuntu-dhcp-client-uses-ids-instead-of-mac-addresses-cant-change-this-behavior https://askubuntu.com/questions/1498611/ubuntu-dhcp-client-u... (linked because depending on version, there are several different ways to make this change..)