Control Flow Items contains Containers and Tasks.
. Containers are Components which holds the tasks and the task will be executed as per the containers nature.
. Tasks are activity which performs a action.
. SSIS supports various type of tasks related to database, file system, process, web service, FTP, Xml, Sql jobs, message queues.
. Each task can be ordered, or aranged in sequence like one after the other or in parellel using Precedence Constraints.
. Container helps to execute repeative tasks, and also to make a group of task over package.