On the Web Protection > Application Control > Network Visibility page, you can enable and disable application control.
When application control is enabled all network traffic is classified and logged according to its classification. Current network traffic can be viewed via the Flow Monitor with in-depth information about its type (see chapter Flow Monitor). For example, information on HTTP traffic is drilled down to the underlying applications, for example "Twitter", "Facebook", and so on. To open the Flow Monitor, select the desired interface in the Flow Monitor section and click the Open Flow Monitor button.
Regarding logging and reporting, there is extensive information available on network traffic and its classification, as well as clients and servers that use those applications. For more information on logging and reporting, see chapter Logging & Reporting, section View Log Files for logging, and section Network Usage > Bandwidth Usage and Web Protection > Application Control for reporting.