What's the difference between cloud class and cloud class?

They are all taught online, and the difference is not big.

Cloud means that you are the object of service, and you can enjoy the services provided by cloud computing anytime and anywhere. Cloud is a metaphor of network and internet. Clouds are divided into private clouds, public clouds, hybrid clouds and industrial clouds. Clouds are common when drawing a network topology or network structure. In the past, cloud was often used to represent telecommunication network, and later it was also used to represent the abstraction of Internet and underlying infrastructure.