MTG how does trample work vs protection from

[Swordcraft]

how does trample work vs protection from that color in magic?

[Akarian]

Example: A 6/6 green creature with trample is blocked by a 2/2 creature with protection
from green. The attacking creature’s controller must assign at least 2 damage to the
blocker, even though that damage will be prevented by the blocker’s protection ability.
The attacking creature’s controller can then choose to assign the rest of the damage to
the defending player.