Hello,
Symantec Protection Suite Enterprise consists of :
1) Enterprise Edition for Endpoints
2) Enterprise Edition for Servers
3) Enterprise Edition for Gateway.
Symantec Protection Suite Enterprise Edition creates a protected endpoint and messaging environment that is secure against today's complex malware, data loss and spam threats, and is quickly recoverable in the event of failure. Reduce the cost of securing your environment and more effectively manage the inherent risks of today's IT infrastructures with Symantec's market-leading technologies.
Symantec Protection Suite Enterprise Edition is an unparalleled combination of award-winning technologies from the world leader in security and data protection that enables you to completely protect, easily manage, and automatically control the assets most crucial to your business.
Please check this:
http://eval.symantec.com/mktginfo/enterprise/fact_sheets/b-symc_protection_suite_ent_edition_Endpoints_DS_21029792.en-us.pdf
http://symcdata.info/vmworld/assets/Symantec%20Protection%20Suite%20Enterprise%20Edition.pdf
In other words, you would be having Symantec Endpoint Protection version 11 or Version 12.1 in the same package for Endpoint security along with other softwares meant for Backup / Recovery, Mail security, and so on...