求翻译：管理级平台是卡服务中心系统专用局域网，是系统核心数据库、中心服务器和各种应用服务器所在地，通过防火墙同三级平台相联，提供各种业务处理。是什么意思？

Private local area network management platform is the card service center system, is the core database system, the central location of the server and applications server, associated with three-scale platform through the firewall, providing business processing.