As name states Symantec Endpoint Protection manger. It is just a management console which is there just for the ease of administartotrs Provide Centralized Adminstartion and Monitoring. It is only a used for configuration
IT DOES NOT PROVIDE ANY VIRUS PROTECTION. FOR THAT YOU NEED SEP CLIENT
Check the Admin Guide
SEP: The Symantec Endpoint Protection client protects the computers with virus scans, a firewall, an intrusion prevention system, and other protection technologies. It
runs on the servers,
SEPM : Symantec Endpoint Protection Manager is a management server that manages the client computers that connect to your company's network. Symantec Endpoint Protection Manager includes the following software:
■ The console software coordinates and manages security policies and client computers.
■ The server software provides secure communication