Difference between DoS and DDoS

Difference between DoS and DDoS:

1. DoS (service request), the intention here is that an attacker will request access to the server excessively by using a ping in a large number so that the server is overwhelmed to receive requests from the attacker
2. While DDoS (distributed service denial), means that the attacker will send a packet / code to the requested internet that will infect the user's computer so that the compilation of the attacker activates the code, the computer user will send a request to the server so the server cannot accept the request