There are fewapplications which wants to work just on application data. They are leastbothered about the L3/L4 data. And hence classifier for such type of input datais important when it comes to real time processing of application data.

Many times securityapplications like URL Filters, Web Security, Email Security, Email Encryptionexpects L7 data as a input. However to get the exact type of application dataat wire-speed is difficult. There are many vendors provides DPI basedapplication recognition tools which segregates the network data and marks theflow with the identified application. Specific application data then can be used topass as input to the systems described above.