A Commcell environment is the logical grouping of all the software components that secure, transfer, and manage data and information. It contains a CommServe host, MediaAgent, and Clients.
CommServe - It is the central management component that coordinates and executes all Commcell operations.
MediaAgent - It is a data transmission manager in the Commcell environment, which enables high-performance data movement and handles data storage libraries.
Client - A Client is a logical group of agents that defines the protection, management, and movement of data associated with the client.