Network layer DDoS and application layer DDoS difference

To go to the bank to do business examples:

Network layer DDoS is to let the road to the bank become congested, unable to get the people who really want to go to the bank, often use the protocol as a network layer, such as TCP (using three handshake response to wait and limit the number of computer TCP connections), etc.

The application layer DDoS is to consume the bank's business resources, such as using HTTP (view all Web pages, large resource-intensive web pages such as video, etc.), or let the website deal with complex data such as verification, calculation, etc.

Both essentially consume resources so that the server is unable to serve real users

Network layer DDoS and application layer DDoS difference