types of armor

Sorry for my ignorance or misunderstanding but i cared about wanted to understand one thing, what is the difference between Crush Armor and Splash Damage Reduction, both are armor used to counteract the shots of siege, ballistic, catapults?
The Bonus Damage Protection, does it work for any hit received by any enemy unit?
if I am not very indiscreet I could ask if someone could write / draw a graph with more technical explanations.
Some like Cavalry Bonus Damage, Infantry Bonus Damage, Melee-Cavalry Armor, Melee-Infantry Armor etc. are understanding since the word itself makes you understand it, but others is not quite so clear, and if you have the game translated into your language a sometimes it tells you something else.

 

theoretically, as I suspected, however, I also liked to listen to someone else's opinion. I had tried to deal with this discord discussion, but I was ignored. If someone else has something to add that I can instruct on certain other things, I am all ears

 

thank you I found it really useful and instructive for a passionate person in having to insert the right object to the appropriate unit