Where exactly is the difference between / ban and / ban-ip at Minecraft?

I do not really understand the difference between / ban and / ban-ip at Minecraft. Although I know that the IP is banned by the IP spell, but do not understand what then the normal spell is, if you can easily but with "change player name".

Address is an IP address. You can also lock your own IP address. Absent IP addresses can also be blocked. Instead of the IP address, the name of a present player can also be specified. Then its IP address is blocked, but not its name. To also lock the name, see https://minecraft-de.gamepedia.com/...com/Befehl" class="text-primary">https://minecraft-de.gamepedia.com/...com/Befehl" class="text-primary">https://minecraft-de.gamepedia.com/...com/Befehl
https://minecraft-de.gamepedia.com/Befehl / ban
,

https://minecraft-de.gamepedia.com/Befehl / ban-ip

That's not right anymore. In the past, / ban was actually the blocking of the name. But in the meantime, the ban systems have been retrofitted and now assign so-called UUIDs to a sample. These are forever connected to the account, not the name. So in principle, as your date of birth remains forever yours, but your name is changeable. Thus, the UUID is blocked with / ban, not the name

The command "/ Ban" just bans one player. There's nothing to rename. This is because your UUID is banned. "/ ban-ip" But bans your ip-address, that means as much as:

No one logged into your internet can connect more to the network. It does not matter if it's you or your sister with her own account.

Thank you.