Earlier quoted context omitted.
The internet traditionally uses location-addressing. A DNS name pointing to a IP which has a specific location your computer tries to reach in order to fetch the content. This means that particular node needs to respond to you, and the bandwidth is depending on the bandwidth available on the particular path to that specific node. Instead, IPFS uses content-addressing, where the content is hashed and given a ID based…
How do you mark something for deletion? Or once its in the network thats it? Seems easy to DDOS by changing one character many times in a file which generates a new id each time
The same as you'd delete anything from any protocol essentially, you delete it locally. If you've shared it on the internet, you ask people nicely to delete it, if they refuse, you either pursue them legally or give up. Basically, just like how you delete a picture from the internet today.
> Seems easy to DDOS by changing one character many times in a file which generates a new id each time
All you're doing in that case is adding more files locally and filling your hard-drive with random files. No content gets automatically distributed unless people request it.