system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What is a "Layer 7 DDOS attack"?

I understand the basic premise of a DDOS attack (a huge amount of computers/servers make massive amounts of request to one server and/or PC). But when I was reading about the attacks against voat.co they kept reffering to it as a "Layer 7 attack". I'm just wondering what the specifics on that are.
gpt
To really **ELI5**... Imagine your whole class wants to prevent the teacher from getting work done, so you band together to ruin his/her day. You have some different options:

1. Bang pots and pans and turn out the lights.
2. Hum music or play the kazoo while wearing a mask.
3. Babble nonsense streams of syllables and make silly faces.
4. Continually interrupt and try to talk over one-another.
5. You sit at your desk, politely say "excuse me, Teacher?" and raise your hand... But when called on you pretend nothing happened. If the teacher asks you a question, you start answering and then pretend to fall asleep.
6. You act normally, except you speak entirely in an unintelligibly thick accent. 
7. You ask lots of understandable questions for answers you don't care about. If the teacher asks you a question, you give an answer which is understandable but useless, like: "It depends... On... the stuff."

The exact numbers blur together, but as you go to higher numbers on the scale, it takes more time and effort from you... but it also becomes harder for the teacher to clearly identify (and unarguably punish) you for your disruption.